You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule methyl (3S)-1-(3-methyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine-1-carbonyl)-2,3-dihydroindole-3-carboxylate ?
user
C19H21N3O3
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