Hi, Please could you provide me with a quotation for Guanine. I require the material to be made to GMP (manufactured under a controlled environment as this will be a registered starting material going into a Pharmaceutical process). Delivery will be to our UK address.rnCAS #: 73-40-5rnQuantity Required: 0.5KG, 1KG & 5KGrnSpecification: Please confirm. Many thanks !