{TAIL ~ This invention} relates to inhibitors of {HEAD ~ cysteine proteases}, especially those of the papain superfamily 
{ TAIL ~ This invention } relates to inhibitors of { HEAD ~ cysteine proteases } , especially those of the papain superfamily
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH