{HEAD ~ Suitable 4 2 piperazinones} include 4 2 piperazinone, 4 1 methyl 2 piperazinone, 4 3 methyl 2 piperazinone, 4 5 methyl 2 piperazinone, 3 ethyl 4 2 piperazinone, 3 ethyl 4 2 piperazinone, 6 ethyl 4 2 piperazinone, 4 5,6 dimethyl 2 piperazinone, 1 ethyl 4 2 piperazinone, 4 3 phenyl 2 piperazinone, 1,4 bis 2 piperazinone, 4 2 piperazinone, {TAIL ~ 4 2 piperazinone} and 4 6 methyl 2 piperazinone 
include
{ HEAD ~ Suitable 4 2 piperazinones } include 4 2 piperazinone , 4 1 methyl 2 piperazinone , 4 3 methyl 2 piperazinone , 4 5 methyl 2 piperazinone , 3 ethyl 4 2 piperazinone , 3 ethyl 4 2 piperazinone , 6 ethyl 4 2 piperazinone , 4 5,6 dimethyl 2 piperazinone , 1 ethyl 4 2 piperazinone , 4 3 phenyl 2 piperazinone , 1,4 bis 2 piperazinone , 4 2 piperazinone , { TAIL ~ 4 2 piperazinone } and 4 6 methyl 2 piperazinone
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH