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 (3R)-3-ethoxypyrrolidine;[4-methanimidoyl-5-[(2-methylpyridin-4-yl)amino]pyridin-2-yl]urea .
user
C19H27N7O2
assistant