[alpha(R),2R,7Z,9E,12R,13E,17R(R),20S]-alpha-Hydroxy-alpha,2,14-trimethyl-11,19-dioxo-12-[tetrahydropyran-2(R)-yloxy]-4,20-dithia-1,21-diazatricyclo[15.2.1.1(3,6)]heneicosa-3(21),5,7,9,13-pentanene-17-ethanetioic acid 20-oxide S-(5-methyl-2-oxo-1,3-dioxol