2H-Pyran-3(6H)-one, 2-(((3beta,20S)-20-((5-((2,6-dideoxy-3-O-methyl-beta-D-ribo-hexopyranosyl)oxy)tetrahydro-4-methoxy-6,9'-dimethylspiro(2H-pyran-2,3'(4'H)-(7H)pyrano(3,4-c)(1,2,5)trioxepin)-7'-yl)oxy)-17-hydroxypregn-5-en-3-yl)oxy)-4-methoxy-6-methy