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