You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (4-nitrophenyl)methyl (3R,4S,6R,7R,8S,8aS)-8-carbamoyl-5'-[2-(cyclohexen-1-yl)ethynyl]-6-[4-(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 into molecular formula.
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C51H44N4O10
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