{TAIL ~ The present invention} is directed to novel 1 piperazine derivatives substituted at {HEAD ~ the position} 2 of the phenyl ring 
{ TAIL ~ The present invention } is directed to novel 1 piperazine derivatives substituted at { HEAD ~ the position } 2 of the phenyl ring
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH