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What is the molecular formula of the molecule (2R)-2-[(2R,5S)-6-[(2S,3S,4S,6R)-6-[(3S,5S,7R,9S,10S,12R,15R)-15-[bis(prop-2-enyl)carbamoylamino]-3-[(2R,5R,6S)-5-ethyl-5-hydroxy-6-methyloxan-2-yl]-3,10,12-trimethyl-4,6,8-trioxadispiro[4.1.57.35]pentadec-13-en-9-yl]-3-hydroxy-4-methyl-5-oxooctan-2-yl]-5,6-dimethyloxan-2-yl]butanoic acid ?
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C50H82N2O11
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