2,2-二甲基-4-氧代-7-(苯甲氧基)-4H-1,3-苯并二噁英-5-基酯和5-频呐醇酯的混合物

2,2-Dimethyl-4-oxo-7-(phenylmethoxy)-4H-1,3-benzodioxin-5-yl Ester and 5-pinacolatoboron ester mixture