You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-chloroethyl N-[(1S,9S,10S,15R,16R,17S)-15,16-bis(4-hydroxybutyl)-4-[(6-methylpyridin-2-yl)methoxy]-12-(oxan-2-yloxyimino)-9-prop-2-enoxy-8-oxatetracyclo[7.7.1.02,7.013,17]heptadeca-2(7),3,5,13-tetraen-10-yl]-N-methylcarbamate by IUPAC nomenclature, provide its molecular formula.
user
C43H58ClN3O9
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