Chemical structure validation

Question

[Rodolfo Adrián]

Hi,

I'm using Avogadro 1.2.0 to edit a FAD metabolite and add to its structure a couple of nucleotides so that it resembles a ligand for IFIT proteins. As of my knowledge, there aren't reports of a chemical structure validated with such characteristics, how could I validate the stereochemistry of my molecule, is there a structure validation software that aids this?

Thank you so much for your time and help. Greetings.