Non energetic and energetic components are {TAIL ~ essentially organic compounds}, which are substances with {HEAD ~ defined chemical compositions} 
Non energetic and energetic components are { TAIL ~ essentially organic compounds } , which are substances with { HEAD ~ defined chemical compositions }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD