Crystal structure of (1S, 2R, 4R, 9S, 11S, 12R)-9α-hy­droxy-4, 8-di­methyl-12-[(thio­morpholin-4-yl)meth­yl]-3, 14-dioxatri­cyclo­[9.3.0.02, 4]tetra­dec-7-en-13-one. (February 2015)