Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.One advisable way is to synthesize NFM acylating morpholine...
Flaming torches were positioned at intervals along the terrace.沿台阶每隔一段距离布置有燃烧着的火炬.The campers lit torches from the campfire.露营者用营火点燃火把.Torches illuminated the picnic areas.火把照亮了野餐地....