You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R)-6,7-dimethyl-2-(2-morpholin-4-ylethyl)-1-phenyl-1H-chromeno[2,3-c]pyrrole-3,9-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H26N2O4
assistant