You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (5-hydroxy-2-methylpent-2-enyl) 2-hydroxy-3-[11-hydroxy-2-[4-[4-hydroxy-2-[1-hydroxy-3-(3-methyl-1,7-dioxaspiro[5.5]undecan-2-yl)butyl]-3-methylidenespiro[4a,7,8,8a-tetrahydro-4H-pyrano[3,2-b]pyran-6,5'-oxolane]-2'-yl]but-3-en-2-yl]-4-methyl-1,7-dioxaspiro[5.5]undec-4-en-8-yl]-2-methylpropanoate by IUPAC nomenclature, provide its molecular formula.
user
C50H78O14
assistant