Page 1. Monatshefte ffir Chemie 123, 1027- 1036 (1992) Monatshefte tiir Chemie Chemical Monthly ~: Springer-Verlag 1992 Printed in Austria On the Discrimination of Tetrazole Regioisomers by NOE Difference Spectroscopy Wolfgang Holzer* and Christine J~iger [11 Institut fiir Pharmazeutische Chemie, Universit/it Wien, A-1090 Wien, Austria Summary. ... Page 8. 1034 W. Holzer and C. J~iger 2-Methyl-5- (4-pyridyl)-2 H-tetrazoIe (16) ...