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 5-(2,6-dimethylmorpholin-4-yl)-2-hydroxy-7-azatricyclo[9.4.0.03,8]pentadeca-1(15),3(8),4,6,9,11,13-heptaene-12-carbonitrile .
user
C21H21N3O2
assistant