denotes the type of hydrogen in the molecule, specifically a hydrogen attached to the third carbon in the ring
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ethyl 4-(3'-chlorophenylamino)-1-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate
Phenol, 6-bromo-3-methoxy-2-methyl-4-[[4-(phenylmethoxy)-2-butenyl]oxy]-, acetate, (Z)-
