[{"from": "human", "value": "What is number-averaged molecular weight of given SMILES at normal measurement conditions.? ->  CC1=CC=C(C(N(CC(CCCCCC)CCCCCCCC)C2=O)=C(C2=C(C(S3)=CC=C3C(S4)=CC(C4=C5C6=CC(C=C(CC(CCCC)CC)C=C7)=C7S6)=C(C8=CC(C=C(CC(CC)CCCC)C=C9)=C9S8)C%10=C5C=C(C)S%10)N%11CC(CCCCCCCC)CCCCCC)C%11=O)S1\n"}, {"from": "gpt", "value": " 28.3\n"}]