4-Benzylhydroxybenzoic acid 2-hydroxy-3-(theophylline-7-ol)propyl ester 82502-10-1 Bahtpe Benzoic acid, 4-(phenylmethoxy)-, 2-hydroxy-3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purin-7-yl)propyl ester