Synonyms: 1H-4,7a-Propanocyclopenta[c]pyran-4(3H)-carboxylicacid, tetrahydro-4a,5,9,10-tetrahydroxy-7,10-dimethyl-1-oxo-, [4R-(4a,4ab,5b,7a,7ab,9S*,10S*)]-; 1H-4,7a-Propanocyclopenta[c]pyran-4b(3H)-carboxylic acid,tetrahydro-4ab,5b,9a,10b-tetrahydroxy-7a,10-dimethyl-1-oxo- (8CI); Noranisatinic acid