Handling Structure with Non-Integer Stoichiometry

I have a structure with non-stoichiometric compositions:
Comp: Fe18 H144 C126 S18 N18.0 O58.53

I need to pass this to a function for featurization that only accepts integral coefficients. I know I can normalize this formula, but is there a way to encode this normalized formula into the structure object itself?

If not then how does one go about for materials such as these?