e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
The Journal of Organic Chemistry
N-Chloroazasteroids. A novel class of reactive steroid analogs. Preparation, reaction with thiols, and photochemical conversion to electrophilic N-acyl imines
TG Back, K Brunner
Index: Back, Thomas G.; Brunner, Kurt Journal of Organic Chemistry, 1989 , vol. 54, # 8 p. 1904 - 1910
Conclusions Using a combination of NMR and molecular modeling techniques, the structure of moroidin is shown to be composed entirely of L amino acids. Consideration of scalar proton-proton coupling constants eliminates structures having an R configuration at either the 0-substituted leucine or tryptophan residues. Intramolecular NOEs further define the linkage between C2 on the tryptophan indole and N1 on the imidazole ring of histidine. ...