1. FDA approved
drug products: Celestone Soluspan (betamethasone sodium
phosphate and betamethasone acetate) injectable suspension. https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/014602s062lbl.pdf (accessed 20 Oct, 2022).
2. Orange book FDA. https://www.accessdata.fda.gov/scripts/cder/ob/search_product.cfm (accessed 20 Oct, 2022).
3. Betamethasone Sodium Phosphate:
Summary Report; University of Maryland School
of Pharmacy, 2021. http://hdl.handle.net/10713/17490 (accessed 20 Oct, 2022).
4. The use of other conventional
phosphorylating agents such as phosphorous
pentachloride, phosphoric acid and polyphosphoric acid resulted unsatisfactory
for the preparation of 21-phosphates of corticosteroid as reported
in Steroid compounds, Takeda Chemical Industries Ltd
(applicant). GB 1148453 A, 1969.
5. Steroid compounds, Takeda Chemical Industries Ltd
(applicant). GB 1148453 A, 1969.