(2,2'-BINAPHTHALENE)-1,4,5',8'-TETRONE, 1',5-DIHYDROXY-3',7-DIMETHYL- 1',5-Dihydroxy-3',7-dimethyl-(2,2'-binaphthalene)-1,4,5',8'-tetrone 28164-57-0 BRN 1297556 CCRIS 7335 Diospyrin Diospyrin (7CI) Euclein NSC 208730