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Under IUPAC nomenclature, a molecule named (1R)-9-(cyclobutylmethyl)-1,8-dimethyl-3,5-dihydro-1H-[1,2,4]triazino[3,4-c][1,4]benzoxazin-2-one;(1S)-9-(cyclobutylmethyl)-1,8-dimethyl-3,5-dihydro-1H-[1,2,4]triazino[3,4-c][1,4]benzoxazin-2-one;9-(cyclobutylmethyl)-1,8-dimethyl-3-(2-trimethylsilylethoxymethyl)-1,5-dihydro-[1,2,4]triazino[3,4-c][1,4]benzoxazin-2-one is given. What is its corresponding molecular formula?
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C57H77N9O7Si
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