p. 1694 - 1712
(2007/10/03)ethyl 5-aminofuro[2,3-b]pyridine-2-carboxylate
5-(benzyloxycarbonylamidino)furo[2,3-b]pyridine-2-carboxylic acid
ethyl 5-cyanofuro[2,3-b]pyridine-2-carboxylate
5-cyanofuro[2,3-b]pyridine-2-carboxylic acid
ethyl 5-nitrofuro[2,3-b]pyridine-2-carboxylate