You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 3-[[(Z)-5-imidazol-1-yl-2-methylidene-5-methyliminopent-3-enoyl]amino]-6-methoxypyridine-2-carboxylate .
user
C18H19N5O4
assistant