2,2',3,3'-Tetrahydro-2,2',5,5'-tetrahydroxy-6,6',8,8'-tetramethoxy-2,2'-dimethyl-7,10'-bi[4H-naphtho[2,3-b]pyran]-4,4'-dione | 2,2',3,3'-Tetrahydro-2,2',5,5'-tetrahydroxy-6,6',8,8'-tetramethoxy-2,2'-dimethyl-7,10'-bi[4H-naphtho[2,3-b]pyran]-4,4'-dione | 41689-67-2 |