You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-ethyl-3-[[1-[(2-ethyl-1,3-thiazol-4-yl)methyl]piperidin-4-yl]methyl]-2-[(3-methylthiophen-2-yl)methyl]guanidine by IUPAC nomenclature, provide its molecular formula.
user
C21H33N5S2
assistant