9(1H)-Phenanthrenone,2-[[2-O-(6-deoxy-a-L-mannopyranosyl)-b-D-glucopyranosyl]oxy]-7-ethenyl-2,3,4,4a,4b,5,6,7,10,10a-decahydro-1,1,4a,7-tetramethyl-,[2S-(2a,4aa,4bb,7b,10ab)]-