00:01
For both compounds a and b, for the long -term stability studies in solution, we would probably want to have three samples at least at each of the three different temperatures.
00:16
Now, compound a is not very water -soluble, so to get it in solution, it would either need to be in an organic solvent, such as dmso, or in an aqueous solution with, probably some acid to protonate the amine group and make it cationic and soluble and more soluble in water in the case of compound b it is highly water soluble so we probably would just have a simple aqueous solution for each of the three different temperatures the blood plasma compound a probably sparingly soluble as well since blood plasma is substantially water.
01:10
Compound b has a much better chance of dissolving in the blood plasma.
01:15
So bottom line is compound a will have pretty dilute solutions and mixtures.
01:23
Compound b will be much higher concentrations.
01:29
Now, in terms of compound a, thinking about what, could go raw in over two years of storage.
01:37
There are a couple things that jump out.
01:40
First, the ester groups could get hydrolyzed and become carboxolic acids.
01:50
So that would be one side reaction we'd want to try to detect.
01:57
And another one has to do with this ring with the amine in it.
02:03
Amine nitrogen can undergo oxidation.
02:05
But in this case, if it were to oxidize, the ring would probably become aromatic.
02:13
So there are several analytical methods that i would use to test these.
02:21
First, i would use mass spectrometry...