You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2Z,4R,6S)-2-[(2E)-2-[(3aS,7aR)-1-(6-hydroxy-6-methylheptan-2-yl)-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4,6-dihydroxycyclohexan-1-one ?
user
C26H42O4
assistant