You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(1S,12S,13R,14S,15R,16S)-13-(hydroxymethyl)-16-methyl-3,17-diazapentacyclo[12.3.1.02,10.04,9.012,17]octadeca-2(10),4,6,8-tetraen-15-yl]methanol by IUPAC nomenclature, provide its molecular formula.
user
C19H24N2O2
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