52-74-4 BRN 2596139 DICYCLOPENTA(a,f)NAPHTHALENE-2-beta,7-beta-DIOL, HEXADECAHYDRO-2-alpha,7-alpha-D Dicyclopenta(a,f)naphthalene-2-beta,7-beta-diol, hexadecahydro-2-alpha,7-alpha-diethynyl-8a,10a-dimethyl-