7WU 7wu methyl (2S,4aR,4bS,5S,6aS,10aS,10bS,12aS)-2,4b,7,7,10a,12,12a-heptamethyl-5-oxidanyl-1,4,6,8-tetrakis(oxidanylidene)-4a,5,6a,9,10,10b-hexahydronaphtho[1,2-h]isochromene-2-carboxylate 7WU