You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-hydroxy-2-methoxy-5-(2-trimethylsilylethoxymethyl)-6a,7,8,9-tetrahydropyrrolo[2,1-c][1,4]benzodiazepine-6,11-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H28N2O5Si
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