You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-(hydroxymethyl)-2-[(2-methyl-3-sulfanylpropanoyl)oxymethyl]butyl] 2-methyl-3-sulfanylpropanoate by IUPAC nomenclature, provide its molecular formula.
user
C14H26O5S2
assistant