You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[[4-amino-5-(4-ethoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]-1-(azepan-1-yl)propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H27N5O2S
assistant