A compound 1 selected from those in which {HEAD ~ R} represents 7 methoxy and {TAIL ~ 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 { HEAD ~ R } represents 7 methoxy and { TAIL ~ 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH