CCOC(=O)C=O
CNOC
CCOC=C(C(C)=O)C(=O)OCC
CC(C)CCC(=O)O
C[N+](=O)[O-]
CO[NH3+]
O=CO
C1CCNCC1
C=CC(=O)OCC
CC(=O)C(C)(C)CO
BrCc1ccccc1
[NH4+]
O=c1[nH]c2ccccc2c(=O)o1
O=C(Cl)OCc1ccccc1
Cc1c(C#N)cccc1[N+](=O)[O-]
BrCC1CC1
C=C(OCC)[Sn](CCCC)(CCCC)CCCC
BrC(Br)(Br)Br
Brc1ccc2cc[nH]c2c1
COc1ccc(Br)cc1O
On1nnc2ccccc21
CC(C)(C)OC(=O)CC(CCO[Si](c1ccccc1)(c1ccccc1)C(C)(C)C)C(=O)[O-]