Lenthionine, a naturally occurring sulfur compound, gives shiitake mushrooms their interesting flavor. The compound is composed of carbon, sulfur, and hydrogen. A 5.000 gram sample of lenthionine contains 0.6357 g carbon and 0.1070 g hydrogen, and the remainder is sulfur. The molar mass of lenthionine is 188.4 g/mol. Determine the chemical formula for lenthionine.