2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine

C348H210N18O6 — CID 162115951

About 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine

2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine (PubChem CID 162115951) has the molecular formula C348H210N18O6 and a molecular weight of 4739.63 g/mol. Its IUPAC name is 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine.

Molecular Properties

• Compound Name: 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine
• PubChem CID: 162115951
• Molecular Formula: C348H210N18O6
• Molecular Weight: 4739.63 g/mol
• Exact Mass: 4735.67
• IUPAC Name: 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine
• SMILES: c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3ccc4c(c3)oc3ccccc34)n2)cc1.c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3ccc4oc5ccccc5c4c3)n2)cc1.c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3cccc4oc5ccccc5c34)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3ccc4c(c3)oc3ccccc34)nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3ccc4oc5ccccc5c4c3)nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)nc(-c3ccccc3-c3cccc4c3oc3ccccc34)n2)cc1
• InChI: InChI=1S/6C58H35N3O/c1-2-18-36(19-3-1)55-59-56(61-57(60-55)46-26-7-5-21-38(46)43-29-16-30-44-41-24-11-15-35-52(41)62-54(43)44)45-25-6-4-20-37(45)42-28-17-34-51-53(42)47-27-10-14-33-50(47)58(51)48-31-12-8-22-39(48)40-23-9-13-32-49(40)58;1-2-17-36(18-3-1)55-59-56(45-24-6-4-19-38(45)37-33-34-43-42-23-11-15-32-52(42)62-53(43)35-37)61-57(60-55)46-25-7-5-20-39(46)44-27-16-31-51-54(44)47-26-10-14-30-50(47)58(51)48-28-12-8-21-40(48)41-22-9-13-29-49(41)58;1-2-17-36(18-3-1)55-59-56(44-24-6-4-19-38(44)37-33-34-53-47(35-37)42-23-11-15-32-52(42)62-53)61-57(60-55)45-25-7-5-20-39(45)43-27-16-31-51-54(43)46-26-10-14-30-50(46)58(51)48-28-12-8-21-40(48)41-22-9-13-29-49(41)58;1-2-17-36(18-3-1)55-59-56(61-57(60-55)44-24-5-4-21-40(44)43-28-16-34-52-54(43)46-26-9-13-33-51(46)62-52)38-20-14-19-37(35-38)39-27-15-32-50-53(39)45-25-8-12-31-49(45)58(50)47-29-10-6-22-41(47)42-23-7-11-30-48(42)58;1-2-16-36(17-3-1)55-59-56(61-57(60-55)46-24-5-4-20-40(46)38-32-33-45-44-23-9-13-31-52(44)62-53(45)35-38)39-19-14-18-37(34-39)41-26-15-30-51-54(41)47-25-8-12-29-50(47)58(51)48-27-10-6-21-42(48)43-22-7-11-28-49(43)58;1-2-16-36(17-3-1)55-59-56(61-57(60-55)45-24-5-4-20-40(45)38-32-33-53-47(35-38)44-23-9-13-31-52(44)62-53)39-19-14-18-37(34-39)41-26-15-30-51-54(41)46-25-8-12-29-50(46)58(51)48-27-10-6-21-42(48)43-22-7-11-28-49(43)58/h6*1-35H
• InChIKey: ZGTMSQVCZXJMHO-UHFFFAOYSA-N
• XLogP: 86.70
• TPSA: 310.86 Ų
• H-Bond Acceptors: 24
• Rotatable Bonds: 30
• Heavy Atoms: 372
• Complexity: —

Lipinski Rule of Five

3 violations

Rule	Value
MW ≤ 500	4739.63
LogP ≤ 5	86.70
H-Bond Donors ≤ 5	0
H-Bond Acceptors ≤ 10	24

Frequently Asked Questions

What is the IUPAC name of 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine?

The IUPAC name of 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine (CID 162115951) is 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine.

What is the SMILES notation for 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine?

The canonical SMILES for 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine is c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3ccc4c(c3)oc3ccccc34)n2)cc1.c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3ccc4oc5ccccc5c4c3)n2)cc1.c1ccc(-c2nc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5ccccc54)c3)nc(-c3ccccc3-c3cccc4oc5ccccc5c34)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3ccc4c(c3)oc3ccccc34)nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3ccc4oc5ccccc5c4c3)nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)n2)cc1.c1ccc(-c2nc(-c3ccccc3-c3cccc4c3-c3ccccc3C43c4ccccc4-c4ccccc43)nc(-c3ccccc3-c3cccc4c3oc3ccccc34)n2)cc1.

What is the InChIKey of 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine?

The InChIKey is ZGTMSQVCZXJMHO-UHFFFAOYSA-N. The full InChI is InChI=1S/6C58H35N3O/c1-2-18-36(19-3-1)55-59-56(61-57(60-55)46-26-7-5-21-38(46)43-29-16-30-44-41-24-11-15-35-52(41)62-54(43)44)45-25-6-4-20-37(45)42-28-17-34-51-53(42)47-27-10-14-33-50(47)58(51)48-31-12-8-22-39(48)40-23-9-13-32-49(40)58;1-2-17-36(18-3-1)55-59-56(45-24-6-4-19-38(45)37-33-34-43-42-23-11-15-32-52(42)62-53(43)35-37)61-57(60-55)46-25-7-5-20-39(46)44-27-16-31-51-54(44)47-26-10-14-30-50(47)58(51)48-28-12-8-21-40(48)41-22-9-13-29-49(41)58;1-2-17-36(18-3-1)55-59-56(44-24-6-4-19-38(44)37-33-34-53-47(35-37)42-23-11-15-32-52(42)62-53)61-57(60-55)45-25-7-5-20-39(45)43-27-16-31-51-54(43)46-26-10-14-30-50(46)58(51)48-28-12-8-21-40(48)41-22-9-13-29-49(41)58;1-2-17-36(18-3-1)55-59-56(61-57(60-55)44-24-5-4-21-40(44)43-28-16-34-52-54(43)46-26-9-13-33-51(46)62-52)38-20-14-19-37(35-38)39-27-15-32-50-53(39)45-25-8-12-31-49(45)58(50)47-29-10-6-22-41(47)42-23-7-11-30-48(42)58;1-2-16-36(17-3-1)55-59-56(61-57(60-55)46-24-5-4-20-40(46)38-32-33-45-44-23-9-13-31-52(44)62-53(45)35-38)39-19-14-18-37(34-39)41-26-15-30-51-54(41)47-25-8-12-29-50(47)58(51)48-27-10-6-21-42(48)43-22-7-11-28-49(43)58;1-2-16-36(17-3-1)55-59-56(61-57(60-55)45-24-5-4-20-40(45)38-32-33-53-47(35-38)44-23-9-13-31-52(44)62-53)39-19-14-18-37(34-39)41-26-15-30-51-54(41)46-25-8-12-29-50(46)58(51)48-27-10-6-21-42(48)43-22-7-11-28-49(43)58/h6*1-35H.

What are the key properties of 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine?

2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine has a molecular weight of 4739.63 g/mol, XLogP of 86.70, 30 rotatable bonds, 0 hydrogen bond donors, and 24 hydrogen bond acceptors.

Where does this data come from?

All data for 2-(2-dibenzofuran-1-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-2-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-3-ylphenyl)-4-phenyl-6-[3-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine;2-(2-dibenzofuran-4-ylphenyl)-4-phenyl-6-[2-(9,9'-spirobi[fluorene]-4'-yl)phenyl]-1,3,5-triazine is sourced from PubChem (CID 162115951), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).