Can't really help directly but bear in mind this thread is 11 years old so things have probably changed. Saying that, a quick search only shows one entry in the Massive Dev Chart for this combination (for 6mins at 22 degrees C for some reason):
https://www.digitaltruth.com/devchar...=C&TimeUnits=D .
You can either do a clip test of the first few frames from the roll (you will of course end up chopping one frame in half and using up a tank of developer - the diluted developer would probably not be reusable as processing the clip would probably have oxidised it too much) and adjust for the rest of the roll accordingly, or take a punt on the whole roll using the MDC time/temp - or accept defeat and use a more common developer with more data available for your films (sorry)...