(3,4-Dihydroxy-5-nitrophenyl)(4-methylphenyl)methanone 134308-13-7 3,4-Dihydroxy-4'-methyl-5-nitrobenzophenone CCRIS 7904 Methanone, (3,4-dihydroxy-5-nitrophenyl)(4-methylphenyl)- Ro 40-7592 Tasmar Tolcapone Tolcapone [USAN:INN]