A compound 1 selected from those in which R represents {TAIL ~ 7 methoxy} and {HEAD ~ R1} represents hydrogen, addition salts thereof with a pharmaceutically acceptable base, and isomers, epimers and diastereoisomers thereof 
A compound 1 selected from those in which R represents { TAIL ~ 7 methoxy } and { HEAD ~ R1 } represents hydrogen , addition salts thereof with a pharmaceutically acceptable base , and isomers , epimers and diastereoisomers thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH