Cationic azo dyes containing 2oxazolo pyridines and {HEAD ~ similar compounds} as {TAIL ~ diazo components} 
as
Cationic azo dyes containing 2oxazolo pyridines and { HEAD ~ similar compounds } as { TAIL ~ diazo components }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL