[{"from": "human", "value": "Given SMILES, write its Mw at normal measurement conditions.. ->  CC1=CC(CCCCCCCCCCCCCC)=C(C2=CC3=C(S2)C=C(C4=C(CCCCCCCCCCCCCC)C=C(C)S4)S3)S1\n"}, {"from": "gpt", "value": " 22\n"}]