Synonyms: NSC281256;546-30-5;7-Acetyl-4,6-dihydroxy-5,11-dimethyl-3-methylene-14-oxospiro(2-hydrobenzo(b)furan-2,3'-cyclopentane)-10-ene-10-carboxylic acid;7-Acetyl-4,6-dihydroxy-5,11-dimethyl-3-methylene-14-oxospiro[2-hydrobenzo[b]furan-2,3'-cyclopentane]-10-ene-10-carboxylic acid;AC1L87EG;NSC 281256;NSC-281256;7-acetyl-4,6-dihydroxy-2',5-dimethyl-3-methylidene-5'-oxospiro[1-benzofuran-2,3'-cyclopentene]-1'-carboxylic acid