You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R)-9-[2-methyl-5-(2-methyl-1,3-oxazol-5-yl)phenyl]sulfonyl-2-oxa-9-azaspiro[4.5]decane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H24N2O4S
assistant