Additional Relevant Details Under the terms of the acquisition, Flamel will pay $20.25 million over a five year period to Deerfield for all of its equity interests in FSC Holdings. Whereby, Flamel will pay $1.05 million annually for five years and will make a final payment in January 2021 of $15.0 million. Flamel will also pay Deerfield a 15% royalty per annum on net sales of the current FSC products, up to $12.5 million for a period not exceeding ten years.