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(R)-6-[(S)-1-Hydroxy-1-((1S,3R,8R,9S,10R,13S,14R,17S)-1,3,14,17-tetrahydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-ethyl]-3,4-dimethyl-5,6-dihydro-pyran-2-one