You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-(4-aminobutyl)-6-carbamimidoyl-1-(naphthalen-1-ylmethyl)-1-oxido-2,3-dihydroindol-1-ium-2-carboxamide ?
user
C25H29N5O2
assistant