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