JSPEN
Are you making them by stereoselctive synthesis or resolution/chiral column?
Might be worth checking their stability in terms of optical purity-you can incubate them in media and then check by chiral HPLC for example and there are ways around this (placing a F or Me on the benzylic position that might scramble). The last thing you want is racemisation
I’ve been chatting with a chiral separation company, as a colleague from France wanted some info. I can make an introduction if you like…