[{"from": "human", "value": "Write number-averaged molecular weight of given SMILES at normal measurement conditions.. ->  CC1=CC=C(C2=C3C(C(N2CC(CCCCCCCCCC)CCCCCCCCCCCC)=O)=C(C4=CC=C(C5=CC=C(C6=CC=C(C)S6)S5)S4)N(CC(CCCCCCCCCCCC)CCCCCCCCCC)C3=O)S1\n"}, {"from": "gpt", "value": " 139\n"}]