In a composition of matter aspect, the invention resides in {HEAD ~ 5 PY 6 Q pyridin 2 amines} or pharmaceutically acceptable acid addition salts thereof, which are useful as {TAIL ~ cardiotonic agents}, where PY and Q are defined hereinbelow 
In a composition of matter aspect , the invention resides in { HEAD ~ 5 PY 6 Q pyridin 2 amines } or pharmaceutically acceptable acid addition salts thereof , which are useful as { TAIL ~ cardiotonic agents } , where PY and Q are defined hereinbelow
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH