You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 3-hydroxy-6-(hydroxymethyl)-2-[(2-hydroxyphenyl)-(pyridin-1-ium-2-ylamino)methyl]pyran-4-one using the IUPAC nomenclature.
user
C18H17N2O5+
assistant