{HEAD ~ Isothiazoles} having a 3 amino 2 OR propoxy or propyl substituent and {TAIL ~ their pharmaceutical use} 
having
{ HEAD ~ Isothiazoles } having a 3 amino 2 OR propoxy or propyl substituent and { TAIL ~ their pharmaceutical use }
HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL