You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 3-[7,12-diethyl-18-(3-methoxy-3-oxopropyl)-3,8,13,17-tetramethyl-2,3,22,23-tetrahydroporphyrin-2-yl]propanoate .
user
C36H44N4O4
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