You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,2S,4R,4aS,10bS)-2-ethyl-1,4-bis(phenylmethoxymethyl)-1,2,4,4a,6,10b-hexahydropyrano[3,4-c]isochromene into its molecular formula.
user
C30H34O4
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