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 N-(2,3-dihydroxy-1,10-dimethoxy-9-oxo-6,7-dihydro-5H-benzo[a]heptalen-7-yl)formamide .
user
C19H19NO6
assistant