You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5S,6R)-6-[(5S)-5H-imidazo[5,1-a]isoindol-5-yl]-5,6,7,8-tetrahydroisoquinolin-5-ol .
user
C19H17N3O
assistant