You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(3R,3aR,6R)-6-(2-iodoethyl)-3a,6-dimethyl-3-[(2R)-6-methylheptan-2-yl]-2,3,4,5,5a,7,8,9,9a,9b-decahydro-1H-cyclopenta[a]naphthalen-7-yl]methyl selenocyanate .
user
C27H46INSe
assistant