You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2S,4aS,5R,5'S,6S,8aS)-1,5'-bis(hydroxymethyl)-1,4a,5',6-tetramethylspiro[3,4,6,7,8,8a-hexahydro-2H-naphthalene-5,2'-oxolane]-2-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H34O4
assistant