15918-62-4 2,3-Methylenedioxy-5,7-dimethoxy-10-nitrophenanthroic acid 6-Methoxyaristolochic acid D 8,10-Dimethoxy-6-nitrophenanthro(3,4-d)-1,3-dioxole-5-carboxylic acid Aristolochic acid IV Aristolochic acid IV(sub a) methyl ether BRN 1332635 O-Methylaristolochic acid D Phenanthro(3,4-d)-1,3-dioxole-5-carboxylic acid, 8,10-dimethoxy-6-nitro-