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Heparin is derived from pig intestines .

肝素可以从猪肠中提取而来。

The fda said it has established a potential link between the chemical and allergic reactions and deaths associated with contaminated heparin .

美国药监局称，已确定多硫酸软骨素与受污染肝素钠引起的过敏反应及死亡病例之间存在潜在关联。

In the heparin case chinese suppliers replaced the main ingredient with a cheaper , dangerous substance that still passed authentication tests .

上述肝素案例中，中国供应商就曾将其主要成份更换成更便宜，具有危险性的物质，但还是通过了各种认证测试。

Citing an internal fda document from april 2008 , the letter says some lots of crude heparin that chongqing imperial supplied to an ohio company tested positive for contamination .

信中援引2008年4月fda的一份内部文件说，重庆骏望供给一家俄亥俄公司的部分批次的粗肝素被检测出受到了污染。

Disagreements over the cause and investigation of safety problems with heparin is the latest blow to sino-american co-operation over questions of unsafe products made in , or with ingredients sourced , in china .

中美双方正合作解决中国制造或提供原料的不安全产品问题，在肝素钠安全问题原因和调查上的分歧，成为对这一合作的最新打击。