Refers to a chemical compound with four substituent groups attached to a specific position on the molecule.
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3,8-bis-(4-methoxyphenyl)-2-methyl-1,10-phenanthroline
2,6-dimethylphenyl 2,3,3-trimethylbutanoate
3,5,6,8-tetra(para-biphenyl)-1,10-phenanthroline
4-Pentenoic acid, 2-acetyl-3-methyl-5-(phenylsulfonyl)-, ethyl ester, (4E)-
