BUT-UNK-efbf8c2c-1
Fc1ccc(Cl)cc1
BUT-UNK-efbf8c2c-2
CC12C3(C)C4(C)C1(C)C1(C)C2(C)C3(C)C41C
BUT-UNK-efbf8c2c-3
C1CCC2CCC(C1)CC(CCC1CC3CCCCC(CC3)C1)C2
ok ok