A 2.52g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 3.87g of CO2 and 0.792 of H2O as the only carbon and hydrogen containing products respectively.

Another sample of the same compound, of mass 4.14g , yielded 2.31g of SO3 as the only sulfur containing product.

A third sample, of mass 5.66g , was burned under different conditions to yield 2.49g of HNO3 as the only nitrogen containing product.

Calculate the empirical formula of the compound.
Express your answer as a chemical formula. Enter the elements in the order: C, H, S, N, O.