Yes. That one has always been a big headache for reservists. You are serving in the primary reserve, but your full time job is in research for a pharmaceutical company. So long as it's primary reserve service, you are OK because, when not serving on class A, B or C (i.e. when you are NOT doing reserve service), you are not subject to the NDA and are a simple civilian and all you develop for your employer has IP disposed of based on that employment contract.
But you terminate your PRes service and elect to be put on the SuppList and suddenly, because of that decision, nobody really knows what happens to any IP you wish to register in your name or in the name of your employers.
I have seen employers knowledgeable of that decision do two things: Some will say, when you decide to quit the reserve force, you quit period - no supp res for you - while others will say, screw this, if you develop something for us they will never find out anyway and if they do, they wont want the negative publicity of being seen as stealing IP they have nothing to do with from a private company.