You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-diethyl-3-hydroxy-4-[[4-[[(1R)-1-(5-methylthiophen-2-yl)propyl]amino]-5-oxido-1,2,5-oxadiazol-5-ium-3-yl]amino]thiophene-2-sulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H25N5O5S3
assistant