[pmlamotte]

In addition to the typical forms, there's also the synthetic analog idebenone. Obtaining it these days in an oral form is a bit harder though.

https://en.wikipedia.org/wiki/Idebenone

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7913973/

[dmix]

Interesting is there a connection between Quinone and CoQ10?