(4aR,5S,8R)-8-(2,4-Dimethyl-oct-2-enoyloxy)-2,9a-dihydroxy-3,4a-dimethyl-2,3,3a,4,4a,5,6,7,8,9a-decahydro-naphtho[2,3-b]furan-5-carboxylic acid AIDS-088134 AIDS088134