Taking the case where the basic skeletal structure is represented by general formula , specific examples of {HEAD ~ compounds} based on {TAIL ~ the benzoquinoline parent skeletal structure} are those with a structure represented by general formula  
based on
Taking the case where the basic skeletal structure is represented by general formula , specific examples of { HEAD ~ compounds } based on { TAIL ~ the benzoquinoline parent skeletal structure } are those with a structure represented by general formula
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH