4614-52-2 Methyl 1,2,3,4abeta,5,6,6aalpha,7,11,11abeta,11b-dodecahydro-4alpha,7beta,11balpha-trimethylphenanthro(3,2-b)furan-4-carboxylate Phenanthro(3,2-b)furan-4-carboxylic acid, 1,2,3,4abeta,5,6,6aalpha,7,11,11abeta,11b-dodecahydro-4alpha,7beta,11balpha-trimethyl-, methyl ester