heterocycle

1.The penem antibiotics are a series of unclassical β-lactam antibiotics including thio-substituted, carbon-substituted, heterocycle-substituted penems and the β-lactamase inhibitors.

青霉烯是一非典型β-内酰胺抗生素,能用于治疗由多菌引起的重症感染。

2.These on reduction with NaBH4 gave exclusively cis-3-heterocycle substituted chroman-4-ols in good yields.

【文摘】3,3-Dibromochroman-4-ones on reaction with different heterocyclic secondary amines gave 3-substituted chromones.