00:01
In this problem, we're given two different molecules, serine and adrenaline, and we're looking at their stereocentors.
00:08
In other words, their carbon has four different groups on it.
00:12
And this allows us to assign what's called handedness, so we give r or s configuration.
00:18
And we have a system that allows us to give priorities to different groups attached to that carbon in order to find whether it's r or us.
00:26
So we go out to the first atom coming out from each.
00:31
Now nitrogen is heavier than our two carbons.
00:35
This is priority one.
00:37
After that, if we go out one more, we have an alcohol or we have a carboxylic acid.
00:42
The carboxylic acid has higher priority...