衍生物的结构式为如上。
其结构式为如图。
该化合物的结构式为：本发明原料易得，操作非常简单，合成催化剂的产率高达70％-80％。
The invention has easily obtained raw material and simple operation, and the productivity for synthesizing the catalyst reaches up to 70-80 percent.
本发明公开了一种抗流感病毒前体药，是有关1，3-吡嗪并恶 嗪-2，4二酮的衍生物，其化学结构式为；
The invention discloses an anti-influenza virus prodrug which is a derivative related to 1, 3-pyrazine oxazine-2, 4 diketone with a chemical structural formula (I);
方法以2005年惠州市惠城区精神疾病普查的169例老年精神病患者为调查对像，采用标准化问卷，以半结构式访谈方式进行问卷调查。
Methods Investigations were conducted in 169 senile patients with psychoses selected from Huicheng district of Huizhou in 2005 using the Standard Questionnaire and Semi-structured Interview.
本研究以运动员感知到的教练员社会支持为出发点，以开放式问卷调查和半结构式访谈为主要研究方法。
This paper takes the athlete's perception of the coach social support as a starting point, takes the open-ended questionnaire survey and half structure interview as the main research technique.
分子结构式可存储为静态图片格式或动态结构式格式。
A chemical structure can be saved in either a static image format or an "active" format.
本发明的超支化聚酯，具有如下结构式：式中R为不同种类的烷基或者含氟烷基。
The super-branched polyester of the invention has the following structural formula, wherein R is alkyl or fluorine-containing alkyl of different types.
本发明的超支化聚酯，具有如下结构式：式中R为不同种类的烷基或者含氟烷基。
The super-branched polyester of the invention has the following structural formula, wherein R is alkyl or fluorine-containing alkyl of different types.
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