Synonyms:
(s)-4,4',9,9'-tetrahydro-8',10-dihydroxy-5',7'-dimethoxy-4',9,9'-trioxospiro[benzo[1,2-b:5,4-c']dipyran-2(3h),2'(3'h)-naphtho[2,3-b]furan]-7-carboxylic acid methyl ester ; (2s)-4,4',9,9'-tetrahydro-8',10-dihydroxy-5',7'-dimethoxy-4',9,9'-trioxospiro[benzo[1,2-b:5,4-c']dipyran-2(3h),2'(3'h)-naphtho[2,3-b]furan]-7-carboxylic acid methyl ester ; (s)-4',9,9'-trioxo-5',7'-dimethoxy-8',10-dihydroxy-4,4',9,9'-tetrahydrospiro[benzo[1,2-b:5,4-c']dipyran-2(3h),2'(3'h)-naphtho[2,3-b]furan]-7-carboxylic acid methyl ester
