The present invention relates to optionally substituted pyridopyrimidine 2,4 diones or optionally substituted pyridopyrimidine 2 ones, i.e., compounds of {HEAD ~ Formula I}: ##STR1## wherein: {TAIL ~ Y} is CH2 or C  
wherein
The present invention relates to optionally substituted pyridopyrimidine 2,4 diones or optionally substituted pyridopyrimidine 2 ones , i.e. , compounds of { HEAD ~ Formula I } : # # STR1 # # wherein : { TAIL ~ Y } is CH2 or C
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH