Scoparone-13C2D6 is a by-product in the synthesis of Scopoletin-13C,d3 (S200502). Scopoletin-13C,d3, is the labeled analogue of Scopoletin (S200500), used for cosmetics, topical formulations, and foods. Scoparone-13C2D6 is also the labeled form of Scoparone (S199980), which regulates the expression of Th1/Th2 cytokines and IgE and is effective in treating allergic rhinitis.