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system
Name the molecular formula for the molecule established as 2-[1-[(19S)-19-ethyl-19-hydroxy-14,18-dioxo-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaen-10-yl]ethyl]guanidine using the IUPAC nomenclature.
user
C23H23N5O4
assistant