常見例句雙語例句In this paper, two unsaturated alicyclic nitrogen heterocyclic crownethers were synthesized by phase transfer reaction .采用相轉(zhuǎn)移催化反應合成了兩個不飽和脂環(huán)氮雜冠醚。An aryl-replaced nitrogen heterocyclic compound preparation method belongs to the technical field of organic compound catalytic chemistry.一種芳基取代的氮雜環(huán)化合物的制備方法，其屬于有機化合物催化化學技 術領域。ip.comIn recent years, with the rapid development of life sciences, natural products of nitrogen heterocyclic compounds have attracted considerable attention.近年來，隨著生命科學的蓬勃發(fā)展，自然界中普遍存在的含氮雜環(huán)化合物引起了人們極大的關注。 返回 nitrogen heterocyclic