You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by methyl 2-ethyl-3-[[ethyl(10H-pyrazino[2,3-b][1,4]benzothiazin-8-ylmethyl)amino]methyl]-3-methylhexanoate ?
user
C24H34N4O2S
assistant