1,4-Ethanonaphthalene-6,10(4H)-dione, 1,4a,5,8a-tetrahydro-5,9-dihydroxy-1,5,7,9-tetramethyl- 1,4-Ethenonaphthalene-2,6-dione, 1,3,4,4a,5,8a-hexahydro-3,5-dihydroxy-1,3,5,7-tetramethyl- 5520-77-4 NSC49640