单硝酸异山梨酯片的原研厂家是谁?

我们是缓释片，用的是山东的原料药

https://db.yaozh.com/orangebook/392.html

http://www.accessdata.fda.gov/scripts/cder/ob/docs/tempai.cfm；
http://www.accessdata.fda.gov/scripts/cder/drugsatfda/index.cfm?fuseaction=Search.Overview&DrugName=ISOSORBIDE%20MONONITRATE；...
这两个网站什么意思？我查不到这个药啊？请指导一下

Isosorbide mononitrate is a drug used principally in the treatment of angina pectoris and acts by dilating the blood vessels so as to reduce the blood pressure. It is sold by AstraZeneca under the trade name Imdur, and marketed in the UK under the trade names: Monosorb, Chemydur. In India this drug is available under the brand names of Ismo,Isonorm Monotrate, Solotrate, and Monit.

Isosorbide mononitrate is a drug used principally in the treatment of angina pectoris and acts by dilating the blood vessels so as to reduce the blood pressure. It is sold by AstraZeneca under the tr ...
这段话出自哪里？

；
http://www.accessdata.fda.gov/sc ... RBIDE%20MONONITRATE；