How to dock compounds with Si to a protein using Autodock vina?

Question

[Akhilesh]

I have been trying to dock compounds consisting silicon(Ex-Octaphenylsilsesquioxane) with a protein but Pyrx throws up an error saying "Si" is not a valid Autodock type. Note that the Autodock atom types are case sensitive. How can i resolve this issue and continue with my docking process. It would be really helpful if anyone could answer this. Thank you in advance.