You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-1-[(2-methylpropan-2-yl)oxycarbonyl]-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H19NO4
assistant