You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (3S,4Z)-3-methyl-4-[(3S)-3-methyl-2,3-dihydro-1H-phenanthren-4-ylidene]-2,3-dihydro-1H-phenanthrene using the IUPAC nomenclature.
user
C30H28
assistant