You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-(1',3',3'-trimethylspiro[chromene-2,2'-indole]-6-yl)oxyhexyl prop-2-enoate;6-(1',3',3'-trimethylspiro[chromene-2,2'-indole]-8-yl)oxyhexyl prop-2-enoate;(1',3',3'-trimethylspiro[chromene-2,2'-indole]-6-yl) prop-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C78H87N3O11
assistant