[{"from": "human", "value": "What is Mw of given SMILES at normal measurement conditions.? ->  CC(S1)=CC(CCCCCC)=C1C(C2=NSN=C23)=CC=C3C(S4)=C(CCCCCC)C=C4C(S5)=CC(C5=C6C7=CC=C(CCCCCCCCC)S7)=C(C8=CC=C(CCCCCCCCC)S8)C9=C6C=CS9\n"}, {"from": "gpt", "value": " 25.9\n"}]