As none of the IPIX aficionados here can be bothered to actually do any research, and similarly do not appear to understand elementary organic chemistry, I can answer your question:
Compound 30 is not brilacidin.
An example of an n-heptyl group (it just means a group with a hydrocarbon backbone with 7 carbon atoms, including a (CH3)C group:
And here is an arginine residue:
I'm sure all the IPIX mavens who got all excited can see that actually brilacidin has no n-heptyl group.
I'm sure you can all work out the arginine residue bit for yourself.*
You're welcome.
* Just kidding - I know you can't. Brilacidin does in fact have two arginine residues, but it's not Compound 30.
Bearish
“What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so.”