5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride

C80H92Cl2F9N21O8 — CID 158986426

IUPAC5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride
SMILESC.CC#CC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.CC#CC(=O)O.CC(C)(C)OC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.Cl.Cl.NC(=O)c1c(-c2cnn(Cc3cccc(C(F)(F)F)c3)c2)nn(C2CC3(CCNC3)C2)c1N
InChIInChI=1S/C27H32F3N7O3.C26H26F3N7O2.C22H24F3N7O.C4H4O2.CH4.2ClH/c1-25(2,3)40-24(39)35-8-7-26(15-35)10-19(11-26)37-22(31)20(23(32)38)21(34-37)17-12-33-36(14-17)13-16-5-4-6-18(9-16)27(28,29)30;1-2-4-20(37)34-8-7-25(15-34)10-19(11-25)36-23(30)21(24(31)38)22(33-36)17-12-32-35(14-17)13-16-5-3-6-18(9-16)26(27,28)29;23-22(24,25)15-3-1-2-13(6-15)10-31-11-14(9-29-31)18-17(20(27)33)19(26)32(30-18)16-7-21(8-16)4-5-28-12-21;1-2-3-4(5)6;;;/h4-6,9,12,14,19H,7-8,10-11,13,15,31H2,1-3H3,(H2,32,38);3,5-6,9,12,14,19H,7-8,10-11,13,15,30H2,1H3,(H2,31,38);1-3,6,9,11,16,28H,4-5,7-8,10,12,26H2,(H2,27,33);1H3,(H,5,6);1H4;2*1H
InChIKeyKXMALZVAEMEDLH-UHFFFAOYSA-N
MW1717.64 g/mol
LogP11.91
Rot. Bonds15

About 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride

5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride (PubChem CID 158986426) has the molecular formula C80H92Cl2F9N21O8 and a molecular weight of 1717.64 g/mol. Its IUPAC name is 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride.

Molecular Properties

Compound Name5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride
PubChem CID158986426
Molecular FormulaC80H92Cl2F9N21O8
Molecular Weight1717.64 g/mol
Exact Mass1715.67
IUPAC Name5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride
SMILESC.CC#CC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.CC#CC(=O)O.CC(C)(C)OC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.Cl.Cl.NC(=O)c1c(-c2cnn(Cc3cccc(C(F)(F)F)c3)c2)nn(C2CC3(CCNC3)C2)c1N
InChIInChI=1S/C27H32F3N7O3.C26H26F3N7O2.C22H24F3N7O.C4H4O2.CH4.2ClH/c1-25(2,3)40-24(39)35-8-7-26(15-35)10-19(11-26)37-22(31)20(23(32)38)21(34-37)17-12-33-36(14-17)13-16-5-4-6-18(9-16)27(28,29)30;1-2-4-20(37)34-8-7-25(15-34)10-19(11-25)36-23(30)21(24(31)38)22(33-36)17-12-32-35(14-17)13-16-5-3-6-18(9-16)26(27,28)29;23-22(24,25)15-3-1-2-13(6-15)10-31-11-14(9-29-31)18-17(20(27)33)19(26)32(30-18)16-7-21(8-16)4-5-28-12-21;1-2-3-4(5)6;;;/h4-6,9,12,14,19H,7-8,10-11,13,15,31H2,1-3H3,(H2,32,38);3,5-6,9,12,14,19H,7-8,10-11,13,15,30H2,1H3,(H2,31,38);1-3,6,9,11,16,28H,4-5,7-8,10,12,26H2,(H2,27,33);1H3,(H,5,6);1H4;2*1H
InChIKeyKXMALZVAEMEDLH-UHFFFAOYSA-N
XLogP11.91
TPSA413.43 Ų
H-Bond Donors8
H-Bond Acceptors23
Rotatable Bonds15
Heavy Atoms120
Complexity—

Lipinski Rule of Five

4 violations

RuleValue
MW ≤ 5001717.64
LogP ≤ 511.91
H-Bond Donors ≤ 58
H-Bond Acceptors ≤ 1023

Computed Properties (RDKit)

Structural Alerts{'alert_name': 'triple_bond', 'substructure': 'N/A'}

Analyze 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride with MolForge

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Related Compounds

5-amino-1-(2-azaspiro[3.3]heptan-6-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 6-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-2-azaspiro[3.3]heptane-2-carboxylate;but-2-ynoic acid;methane
CID 160619473
5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-3-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-3-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-3-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride
CID 162243245
5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[(2-cyanophenyl)methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[(2-cyanophenyl)methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[(2-cyanophenyl)methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;2,2,2-trifluoroacetaldehyde
CID 159069824
tert-butyl 2-[5-amino-3-(1-benzylpyrazol-4-yl)-4-carbamoylpyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate
CID 129255341
5-amino-3-(1-benzylpyrazol-4-yl)-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)pyrazole-4-carboxamide;5-amino-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)-3-[1-[[3-methyl-5-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 160831972
5-amino-3-(1-benzylpyrazol-4-yl)-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)pyrazole-4-carboxamide
CID 129255258
5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[2-methyl-5-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 129255221
5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[2-chloro-5-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 129255224
5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[3-methyl-1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[(1S)-1-[3-(trifluoromethyl)phenyl]ethyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[(1R)-1-[3-(trifluoromethyl)phenyl]ethyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 158313696
5-amino-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)-3-[1-[[3-methyl-5-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 129255263
5-amino-3-(1-benzylpyrazol-4-yl)-1-[6-(3-cyclopropylprop-2-ynoyl)-6-azaspiro[3.4]octan-2-yl]pyrazole-4-carboxamide;5-amino-1-(2-but-2-ynoyl-2-azaspiro[3.3]heptan-6-yl)-3-[1-[(3,5-dimethylphenyl)methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-chloro-5-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide
CID 158795539
tert-butyl 6-[5-amino-4-carbamoyl-3-[1-[[4-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-2-azaspiro[3.3]heptane-2-carboxylate
CID 129255336

Frequently Asked Questions

What is the IUPAC name of 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride?
The IUPAC name of 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride (CID 158986426) is 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride.
What is the SMILES notation for 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride?
The canonical SMILES for 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride is C.CC#CC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.CC#CC(=O)O.CC(C)(C)OC(=O)N1CCC2(CC(n3nc(-c4cnn(Cc5cccc(C(F)(F)F)c5)c4)c(C(N)=O)c3N)C2)C1.Cl.Cl.NC(=O)c1c(-c2cnn(Cc3cccc(C(F)(F)F)c3)c2)nn(C2CC3(CCNC3)C2)c1N.
What is the InChIKey of 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride?
The InChIKey is KXMALZVAEMEDLH-UHFFFAOYSA-N. The full InChI is InChI=1S/C27H32F3N7O3.C26H26F3N7O2.C22H24F3N7O.C4H4O2.CH4.2ClH/c1-25(2,3)40-24(39)35-8-7-26(15-35)10-19(11-26)37-22(31)20(23(32)38)21(34-37)17-12-33-36(14-17)13-16-5-4-6-18(9-16)27(28,29)30;1-2-4-20(37)34-8-7-25(15-34)10-19(11-25)36-23(30)21(24(31)38)22(33-36)17-12-32-35(14-17)13-16-5-3-6-18(9-16)26(27,28)29;23-22(24,25)15-3-1-2-13(6-15)10-31-11-14(9-29-31)18-17(20(27)33)19(26)32(30-18)16-7-21(8-16)4-5-28-12-21;1-2-3-4(5)6;;;/h4-6,9,12,14,19H,7-8,10-11,13,15,31H2,1-3H3,(H2,32,38);3,5-6,9,12,14,19H,7-8,10-11,13,15,30H2,1H3,(H2,31,38);1-3,6,9,11,16,28H,4-5,7-8,10,12,26H2,(H2,27,33);1H3,(H,5,6);1H4;2*1H.
What are the key properties of 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride?
5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride has a molecular weight of 1717.64 g/mol, XLogP of 11.91, 15 rotatable bonds, 8 hydrogen bond donors, and 23 hydrogen bond acceptors.
Where does this data come from?
All data for 5-amino-1-(6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;5-amino-1-(6-but-2-ynoyl-6-azaspiro[3.4]octan-2-yl)-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazole-4-carboxamide;tert-butyl 2-[5-amino-4-carbamoyl-3-[1-[[3-(trifluoromethyl)phenyl]methyl]pyrazol-4-yl]pyrazol-1-yl]-6-azaspiro[3.4]octane-6-carboxylate;but-2-ynoic acid;methane;dihydrochloride is sourced from PubChem (CID 158986426), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).