[{"from": "human", "value": "Write weight-averaged molecular weight of given SMILES at normal measurement conditions.. ->  CC1=CC=C(C2=C(CCCCCC)N=C(C3=NC(CCCCCC)=C(C4=CC=C(C5=CC([Si](CC(CCCC)CC)(CC(CC)CCCC)C6=C7SC(C)=C6)=C7S5)S4)S3)S2)S1\n"}, {"from": "gpt", "value": " 9.5\n"}]