You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3S)-3-methyloxolan-2-yl]-[4-[(2-methyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-3-yl)methyl]piperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H30N4O2
assistant