1 9AR 9-hydroxy aristolochic acid 1.000 2 GOQ 8-methoxy-6-nitro-naphtho[1,2-E][1,3]benzodioxole-5-carboxylic acid 0.962 3 GOR 6-nitronaphtho[1,2-E][1,3]benzodioxole-5-carboxylic acid 0.885 4 17N 8-methoxyphenanthro[3,4-D][1,3]dioxole-5,6-dicarboxylic acid 0.759