[{"from": "human", "value": "Given SMILES, write its solar cell solar cell PDI as a p-type polymer and PC71BM or PCBM. ->  CC(S1)=CC2=C1C(OC[C@@H](CCCCCCCCCC)CCCCCCCC)=C(C=C(C3=C(CCCCCC)C(SC(C4=CC=C(C5=CC(SC(C)=C6CCCCCC)=C6S5)C7=NSN=C74)=C8)=C8S3)S9)C9=C2OC[C@H](CCCCCCCC)CCCCCCCCCC\n"}, {"from": "gpt", "value": " 4.37\n"}]