Synonyms: 1H-3,10a-Ethenophenanthrene-1,2,8-tricarboxylicacid, 2,3,4,4a,4b,5,6,7,8,8a,9,10-dodecahydro-12-isopropyl-4b,8-dimethyl-,1,2-anhydride, sodium salt (8CI);1H-3,10a-Ethenophenanthrene-1,2,8-tricarboxylic acid,2,3,4,4a,4b,5,6,7,8,8a,9,10-dodecahydro-12-isopropyl-4b,8-dimethyl-, cyclic1,2-anhydride, sodium salt (7CI)