You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(6-ethyl-4,5-dimethyl-3-phenylmethoxyoxan-2-yl)oxy-5-methyl-2-(phosphanylmethoxymethyl)-6-prop-2-enoxyoxan-3-ol;8-(6-ethyl-3-hydroxy-4,5-dimethyloxan-2-yl)oxy-2-phenyl-6-prop-2-enoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-ol by IUPAC nomenclature, provide its molecular formula.
user
C52H79O15P
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