88903-77-9

(2r,3r,4s,10r)-2,10-bis(3,4-dihydroxyphenyl)-4-[(2r,3s)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2h-chromen-8-yl]-3,5-dihydroxy-3,4,9,10-tetrahydro-2h-pyrano[2,3-h]chromen-8-one