您要查找的是不是：
- Synthesis of some new penicillin and cephalosporin derivatives of substituted S-triazine and their bi. 求助一篇文献 有哪位朋友能帮我查到一篇文献，不胜感激。
- Cephalosporin derivative 头孢类抗生素
- An organic derivative, such as coal or petroleum. 有机衍生物一种有机衍生物，如煤或石油
- DFT Study and Quantitative Structure-activity Relationship for Cephalosporin Derivatives 头孢类抗生素定量结构-活性关系的密度泛函研究
- An acyl derivative of hydrazine. 酰肼一种由肼衍生而来的酰
- The quantitative structure - activity relationship of novel cephalosporin derivatives 新头孢菌素衍生物的定量构效关系研究
- A mark used as a superscript to indicate the first derivative of a variable. 撇号置于右上角的符号，用以标明变量的第一个导数
- The derivative of the step is the impulse. 阶梯的导数就是脉冲。
- A derivative is defined by a limiting process. 导数是通过一个极限过程加以规定的。
- Keywords antibacterial infection;Cephalosporin derivatives;Wittig Reaction;Williamson Reaction;Ceftazidime; 抗感染;头孢菌素衍生物;魏悌锡反应;威廉森合成法;头孢他啶;
- They spoke a derivative of the Malay language. 他们说一种从马来语派生的语言。
- A highly derivative prose style. 毫无创意的散文风格
- A derivative word;a derivative process. 衍生词；推导过程
- Not standing alone;derivative or dependent. 从属的，不独立的不独立存在的；衍生性的或依赖性的
- Cefadroxil is important as an oral cephalosporin antibiotic. 头孢羟氨苄是重要的头孢类抗生素。
- An amino - acid derivative of galactose. 半乳糖胺半乳糖的一种氨基酸衍生物
- Derivative that is thrown if the wait times out. 派生类,它在等待超时后即被抛出。
- Derivative works are far more complicated. 派生作品更加复杂。
- The Derivative of a Map between Vector Spaces. 向量空间之间映射的微分。
- Say that the derivative financial instruments. 再说说衍生金融工具。
