Methyl 10.20 1.41 0.40 Trideuteriomethyl 10.20 0.40 n-Butyl 10.36 1.33 0.4 I Phenyl 5.61 0.41 0.41 Benzoyloxy 3.42 0.40 0.40 a R denotes adding group. vation of the hfs of the adding group by means of electron nuclear double resonance (ENDOR) technique makes the assignment more accurate because of the characteristic ENDOR pattern for each spin adduct. The addition of organolithium and Grignard compounds to the nitrone followed by ...