You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2-cyclopropylacetyl)-dimethyl-[3-methyl-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)pyrrolidin-3-yl]azanium into molecular formula.
user
C18H26N5O+
assistant