You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (1S,12S,13R,14R,15E)-15-ethylidene-3-hydroxy-13-(hydroxymethyl)-3,17-diazapentacyclo[12.3.1.02,10.04,9.012,17]octadeca-2(10),4(9),5,7-tetraen-7-ol using the IUPAC nomenclature.
user
C19H22N2O3
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