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What is the molecular formula of the compound with this IUPAC name 2-methoxyethyl 8-(6,7-dimethoxy-3,4-dihydro-1H-isoquinoline-2-carbonyl)-5'-(4-hydroxybut-1-ynyl)-6-[3-(2-hydroxyethoxy)phenyl]-1,2'-dioxo-3,4-diphenylspiro[4,6,8,8a-tetrahydro-3H-pyrrolo[2,1-c][1,4]oxazine-7,3'-indole]-1'-carboxylate ?
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C54H53N3O12
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