You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (6S,7S,8aS)-6-[(3R,5S,6R)-4,5-dibutoxy-2-(butoxymethyl)-6-oct-7-enoxyoxan-3-yl]oxy-2-phenyl-8-[(1S,3S,4S)-2,3,4-tributoxy-5-(butoxymethyl)cyclohexyl]oxy-7-[(2S,3S,5R)-3,4,5-tributoxy-6-methyloxan-2-yl]oxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine by IUPAC nomenclature, provide its molecular formula.
user
C80H142O19
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