You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2-ethyl-2-adamantyl) 2-methylprop-2-enoate;(3-hydroxy-1-adamantyl) 2-methylprop-2-enoate;[3-[(2-methylpropan-2-yl)oxycarbonyloxy]-1-adamantyl] 2-methylprop-2-enoate;(2-oxooxolan-3-yl) 2-methylprop-2-enoate;[2-oxo-2-[(5-oxo-4-oxatricyclo[4.2.1.03,7]nonan-2-yl)oxy]ethyl] 2-methylprop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C71H98O20
assistant