Examples of {HEAD ~ active agents} include a paramagnetic element, a radioactive element and a fibrinolytic agent, among {TAIL ~ others} 
Examples of { HEAD ~ active agents } include a paramagnetic element , a radioactive element and a fibrinolytic agent , among { TAIL ~ others }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL