The compound 1, wherein said {HEAD ~ compound} is {TAIL ~ the following compound}, or a pharmaceutically acceptable salt thereof of the following compound: 
is
The compound 1 , wherein said { HEAD ~ compound } is { TAIL ~ the following compound } , or a pharmaceutically acceptable salt thereof of the following compound :
OTH OTH OTH OTH OTH OTH 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