[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an isomer of selinene where the double bond in the octahydronaphthalene ring system is endocyclic (2R,4aR,8aR)-configuration.. It has a role as a plant metabolite. It is a selinene and a member of octahydronaphthalenes."}, {"from": "gpt", "value": "[C][C][=C][C][C][C@][Branch1][P][C@H1][Ring1][=Branch1][C][C@@H1][Branch1][Branch1][C][C][Ring1][=Branch1][C][=Branch1][C][=C][C][C]"}]