[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a macrocyclic lactone that is avermectin B1b in which the double bond present in the spirocyclic ring system has been reduced to a single bond. It is the minor component of ivermectin. It is a macrocyclic lactone and a spiroketal. It is functionally related to an avermectin B1b."}, {"from": "gpt", "value": "[C][C@H1][C][C][C@][Branch2][Branch2][C][C][C@@H1][C][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][/C][=C][Branch2][#Branch1][C][/C@H1][Branch2][Ring2][Branch2][C@H1][Branch2][Ring2][Ring1][/C][=C][/C][=C][\\C][O][C@H1][C@@][/-Ring1][Branch1][Branch2][Ring1][Branch1][C@@H1][Branch1][#Branch2][C][=C][Branch1][Branch1][C@H1][Ring1][=Branch1][O][C][C][=Branch1][C][=O][O][Ring2][Ring1][#Branch2][O][C][O][C@H1][C][C@@H1][Branch2][Ring1][=C][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][C@H1][C][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][C][O][C][\\C][O][C@@H1][Ring2][Branch1][=Branch2][C][Branch1][C][C][C]"}]