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 2-[3-[(3R,4R)-5-methanimidoyl-2,6-dioxo-3-pyridin-1-ium-1-yl-3,4-dihydropyridin-5-ylium-1-id-4-yl]phenoxy]acetamide ?
user
C19H17N4O4+
assistant