You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 17-[5-[5-(hydroxymethyl)-4-methoxy-3-(3,4,5-trihydroxyoxan-2-yl)oxyoxolan-2-yl]oxy-6-methylheptan-2-yl]-10,13-dimethyl-1,2,3,4,5,6,7,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-3,6,8,15-tetrol .
user
C38H66O13
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