[{"from": "human", "value": "What is Mn of given SMILES at normal measurement conditions.? ->  CC1=C(CCCCCC)C=C(C2=NN=C(C3=CC(CCCCCC)=C(C4=CC(C(CCCCCC)(CCCCCC)C5=C6SC(C)=C5)=C6S4)S3)N=N2)S1\n"}, {"from": "gpt", "value": " 20\n"}]