The Proinsulin human,with the CAS registry number 67422-14-4.It belongs to the product categories of Pharmaceutical Intermedi.This chemical's molecular formula is C₄₁₀H₆₃₈N₁₁₄O₁₂₇S₆.What's more,its systematic name is Proinsulin (pig),30-L-threonine-36-L-aspartic acid-37-L-leucine-39-L-valine-41-L-glutamine-48-L-proline-49a-endo-L-alanine-50a-endo-L-serine-53-L-proline-59-L-serine-60-L-leucine-. It is positive advantage to all diabetics without endogenous insulin secretion.In earliest time,insulin was originally purified from bovine or porcine pancreata.But it cann't Meet people's needs.With the development of science, people synthesize Proinsulin human.