Synonyms: 18412-96-9;GB 2a;GB-2a;AC1L42H8;CHEMBL445452;(2S)-8-[(2S,3R)-5,7-dihydroxy-2-(4-hydroxyphenyl)-4-oxo-2,3-dihydrochromen-3-yl]-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydrochromen-4-one;[3,8'-Bi-2H-1-benzopyran]-4,4'(3H,3'H)-dione, 2'-(3,4-dihydroxyphenyl)-5,5',7,7'-tetrahydroxy-2-(4-hydroxyphenyl)-, (2S,2'S,3R)-