Isopropylpyrazine29460-90-031 % similar 2-Ethoxy-5-fluorouracil56177-80-131 % similar 1,2-Diethoxybenzene2050-46-630 % similar 6-Ethoxypyridin-3-amine52025-34-030 % similar 5-Bromo-2-ethoxypyridine55849-30-430 % similar