Furthermore, it is {HEAD ~ an object} of {TAIL ~ the present invention} to provide 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 
of
Furthermore , it is { HEAD ~ an object } of { TAIL ~ the present invention } to provide 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 HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH