2H-Pyran-3(6H)-one, 2-(((3beta,20S)-20-((5-((O-2-O-acetyl-6-deoxy-3-O-methyl-beta-D-galactopyranosyl-(1-4)-O-2,6-dideoxy-3-O-methyl-beta-D-ribo-hexopyranosyl-(1-4)-O-2,6-dideoxy-3-O-methyl-beta-D-ribo-hexopyranosyl-(1-4)-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-methyl-,(3'S-(3'alpha(4S*,5S*,6S*),5'abeta,7'alpha(6S*),9'alpha,9'aalpha)-)-