You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-(2,3,3a,4,5,6,7,7a-octahydroindol-1-ylmethyl)-N-propyl-1,3,4-thiadiazol-2-amine by IUPAC nomenclature, provide its molecular formula.
user
C14H24N4S
assistant