2-amino-6-chloro-9-(5-phosphonopent-2-en-1-yl)purine

1-(5-phosphonopent-2-en-1-yl)uracil diethyl phosphonoester

9-(5-phosphonopent-2-en-1-yl)guanine diethyl phosphonoester

(Z)-(5-(4-hydroxy-2-oxopyrimidin-1(2H)-yl)pent-3-en-1-yl)phosphonic acid

1-(5-phosphonopent-2-en-1-yl)cytosine