178943-64-1 7,20-Dithia-4,21-diazatricyclo(14.3.1.16,9)heneicosa-6(21),8,10,12-tetraene-1-acetic acid, alpha,15,17-trihydroxy-alpha,5,17-trimethyl-3,14-dioxo-, (alphaS,1R,5R,10Z,12E,15S,16S,17R)-