1·Oral tetracyclines will minimize the risk of infection.
口服四环素可以降低感染的风险。
2·Result Bone-targeting drugs can be developed by synthesis. Among them, tetracyclines and diphosphonic acids are extensively studied.
结果通过化学合成的方法寻找骨靶向性化合物的研究比较广泛，应用最多的是四环素类及双膦酸类。
3·Some primary research to the chemical modification of tetracyclines were carried out. Several tetracycline derivatives were prepared.
我们对四环素类抗生素的化学反应和结构修饰进行了一些初步的探索，制备了一些四环素类衍生物。