[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a potent, selective, orally bioavailable, fluoropyrrolidine-based inhibitor of dipeptidyl peptidase 4 (DPP-4), with hypoglycemic activity."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring2][N][C][N][Branch1][=Branch1][C@@H1][Ring1][Branch1][C][#N][C][=Branch1][C][=O][C@H1][Branch2][Ring1][#Branch2][C][Branch1][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][F][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][F][N][F]"}]