{HEAD ~ Some animals} received {TAIL ~ the free base} of 4 amino 2 ethoxymethyl α,α dimethyl 1H imidazoquinoline 1 ethanol po 
{ HEAD ~ Some animals } received { TAIL ~ the free base } of 4 amino 2 ethoxymethyl α , α dimethyl 1H imidazoquinoline 1 ethanol po
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH