You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-cyano-1-methyl-2-[4-[4-(piperidin-1-ylmethyl)pyrazol-1-yl]oxybutylamino]guanidine by IUPAC nomenclature, provide its molecular formula.
user
C16H28N8O
assistant