Amphastar looks like a shell company. From what i can tell the 2 principal owners are Mary Luo and Jack Zhang who are also involved in entities called: Applied Physics and Chemistry Laboratories (an environmental outfit); Microscience Institute; and Naturastar. As of 2005 the China Development Industrial Bank owned ~10% of Amphastar. The husband-wife team are 100% owners of APCL which, as of 2005, owned roughly 22% of Amphastar; the spouses owned roughly 30% each of amphastar directly.
the amphastar-china website (amphastar nanjing pharmaceuticals) uses the same picture as the amphastar.com website so i'm assuming they are "closely related". looks ultra fishy. Even though they probably have deep pockets, I suspect they are inaccessible.