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