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