You need no proof for "of course" when responding to the questino of whether or not they will receive royalties when it is sold as a combination drug. No one would give away their compound to be mixed without receiving anything. I suspect if combining compounds alleviated the need to pay a royalty you would start seeing Merck start trials mixing Rida with Bayer Asprin with a catchy marketing campaing with the term...... Rida now with headache medicine......