Seems like an extension to memory palace idea, probably never attempted due to the complexity of maintaining the isomorphism at that scale.

One interesting thing to try is to find a professor of molecular biology who really knows the stuff and see what kind of mental structures they have built up to maintain it. "What does JS-154 remind you of"? Etc.

if I ever get an unexpectedly large amount of free time

Don't tempt your fans into getting you some jail time :)