Furthermore, it is {TAIL ~ an object} of the present invention to provide {HEAD ~ a method} of demethylating alkaloid derivatives which is environment friendly and allows a conversion of 14 OH alkaloid derivatives to the respective nor alkaloid derivatives in a high yield 
Furthermore , it is { TAIL ~ an object } of the present invention to provide { HEAD ~ a method } of demethylating alkaloid derivatives which is environment friendly and allows a conversion of 14 OH alkaloid derivatives to the respective nor alkaloid derivatives in a high yield
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH