Gravar-mail: Crystal structure of (1S,2R,4R,9S,11S,12R)-9α-hy­droxy-4,8-dimethyl-12-[(thio­morpholin-4-yl)meth­yl]-3,14-dioxatri­cyclo­[9.3.0.0(2,4)]tetra­dec-7-en-13-one