You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-(2,5-dimethoxyphenyl)-2-(5-methoxy-4,8,8-trimethyl-2-oxo-9,10-dihydropyrano[2,3-h]chromen-3-yl)acetamide ?
user
C26H29NO7
assistant