You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-amino-2-oxo-N-[(3R)-oxolan-3-yl]-1-(1-phenylindol-6-yl)thieno[2,3-b]pyrazine-6-carboxamide .
user
C25H21N5O3S
assistant