OC1=C(C=O)C(O)=C(C(CC(C)C)=O)C(O)=C1C.CC2(C)C3C(C)=CCC2C3
OC1=C(C=O)C(O)=C(C(C(C)C)=O)C(O)=C1C.C/C2=C\C(C3(C)C)C3CC/C(C)=C/CC2
OC1=C(C=O)C(O)=C(C(C(C)C)=O)C(O)=C1C.CC2(C)C3C4=C(C)CCC4C(C)CCC32
OC1=C(C=O)C(O)=C(C(CC(C)C)=O)C(O)=C1C.CC2(C)C3C4=C(C)CCC4C(C)CCC32