You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-[(3S)-2-[(5-phenyl-1H-pyrazol-4-yl)methyl]-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-3-yl]ethanol ?
user
C19H26N4O
assistant