Fig. 3.
Product ion spectra of ions derived from 18, 19, and 20. a [1−9-NαC]-MLIPPFFLI (18, m/z 1072.6246) at tR 7.4 min, b [1−9-NαC]-OLIPPFFLI (19, m/z 1088.6211) at tR 3.7 min, and c [1−9-NαC]-JLIPPFFLI (20, m/z 1104.6150) at tR 5.7 min
Product ion spectra of ions derived from 18, 19, and 20. a [1−9-NαC]-MLIPPFFLI (18, m/z 1072.6246) at tR 7.4 min, b [1−9-NαC]-OLIPPFFLI (19, m/z 1088.6211) at tR 3.7 min, and c [1−9-NαC]-JLIPPFFLI (20, m/z 1104.6150) at tR 5.7 min