You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-(2-hydroxy-1-propan-2-ylindol-3-yl)imino-3-methyl-4-oxophthalazine-1-carboxamide using the IUPAC nomenclature.
user
C21H19N5O3
assistant