You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4S)-4-ethyl-4-methyl-8-morpholin-4-yl-5-oxa-11-thia-9,14,16-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-1(10),2(7),8,12(17),15-pentaen-13-one into its molecular formula.
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C19H22N4O3S
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