Prescription drug

Where is Broussonetia Papyrifera Pollen and Morus Alba Pollen and Morus Rubra Pollen made?

1 company sell it under their own name. None of their labels names the factory.

Companies and their factories

Company on the labelFactoryWhereLast FDA inspection
Antigen Laboratories, Inc. Mulberry Mixture0.0167 g per 1 mL · NDC 49288-0311The label doesn't name the factory. Plants this company names for other drugs