7-Hydroxyaristolochic acid A (CAS No.79185-75-4), its synonyms are 9-Hydroxy-8-methoxy-6-nitrophenanthro[3,4-d][1,3]dioxole-5-carboxylic acid ; phenanthro[3,4-d]-1,3-dioxole-5-carboxylic acid, 9-hydroxy-8-methoxy-6-nitro-