You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2-cyclopentyloxy-5-methylsulfonylphenyl)-[4-[4-(5-methyl-1,3,4-oxadiazol-2-yl)phenyl]piperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H30N4O5S
assistant