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system
Provide the molecular formula for the IUPAC named substance benzyl 2-amino-5-[18-(4-amino-5-oxo-5-phenylmethoxypentyl)-8,13-diethyl-3,7,12,17-tetramethyl-22,23-dihydroporphyrin-2-yl]pentanoate .
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C52H60N6O4
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