You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3R,5S,6S,7S)-7-[(3S,4R,5R,6S)-5-ethyl-4,6-dihydroxy-3,6-dimethyloxan-2-yl]-3-[(3S,5S)-5-[(2R,3R,5R)-5-ethyl-2-hydroxy-5-[(1S)-1-hydroxypropyl]-3-methyloxolan-2-yl]-3,5-dimethyloxolan-2-yl]-6-hydroxy-5-methyloctan-4-one by IUPAC nomenclature, provide its molecular formula.
user
C34H62O9
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