Rachel Fuller Brown was a chemist best known for her long-distance collaboration with microbiologist Elizabeth Lee Hazen in developing the first useful antifungal antibiotic, nystatin, while doing research for the Division of Laboratories and Research of the New York State Department of Health.Rachel Fuller Brown was born on November 23, 1898 in Springfield, Massachusetts to parents George Hamilton Brown, a real estate and insurance agent, and Annie Fuller, a director of religious education. They later moved to Missouri where, at the age of fourteen, Brown’s parents separated and her father left the family with almost no money. So her family of three moved back to Springfield.