In theory you could develop the film as C-41 film with the addition of a yellow coupler to the developer. For green you would add both a yellow and a blue coupler. This is essentially what was done with Kodachrome where the film itself contained no color couplers. Each of the three layers were developed separately. You could look at the developer formulations for this process to find which couplers and their concentrations. The process names were K-12 and K-14.