You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2Z,5Z,8Z,11Z)-1,1,4,4,7,7,10,10,13,13-decamethyl-1,4,7,10,13-pentasilacyclopentadeca-2,5,8,11-tetraen-14-yne into molecular formula.
user
C20H38Si5
assistant