请教：API注册，如何确定起始物料

客户要求我们提供资料做原料药DMF注册，比如我们提供的产品（A)到最终客户API有两步反应，产品（A）本身有3步反应，客户要求供应商提供A产品的3个起始原料的详细工艺资料，主要如下表，想知道是否合理，有无参考资料或相关法规可以学习，感谢赐教

1.	Spec/STP/COA  of Stating  material including  related substances (specified and un-specified) with total impurities and  residual solvents.
2.	Stage-wise ROS of Stating material including all raw materials (reagents, Solvents, catalyst etc.)
3.	Stage-wise  Process flow of  Stating material including  all raw materials (reagents, Solvents, catalyst etc.) used in the process flow
4.	Stage-wise  brief manufacturing process of Stating  material
5.	List of raw materials stage wise by  categorise like reagents/ solvents/ metal catalysts/ filter aids etc.
6.	List  of possible impurities and solvents

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