475-80-9 5-19-07-00425 (Beilstein Handbook Reference) 6-Nitrophenanthro(3,4-d)-1,3-dioxole-5-carboxylic acid Aristolochic acid B Aristolochic acid II BRN 0329754 CCRIS 6497 EINECS 207-499-6 Phenanthro(3,4-d)-1,3-dioxole-5-carboxylic acid, 6-nitro-