Compounds of {TAIL ~ the invention} include all those compounds with {HEAD ~ the isoalloxazine backbone} : 
Compounds of { TAIL ~ the invention } include all those compounds with { HEAD ~ the isoalloxazine backbone } :
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH