You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[[5-(2-methylpropylsulfanyl)-1,3,4-thiadiazol-2-yl]sulfanyl]-N-naphthalen-2-ylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H21N3OS3
assistant