Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1M8D
Inducible Nitric Oxide Synthase5,6,7,8-TETRAHYDROBIOPTERINCHLORZOXAZONEPROTOPORPHYRIN IX CONTAINING FESULFATE ION
nitric oxide synthaseinduciblechlorzoxazonebound
https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=3f90c7bc-118f-4371-e063-6394a90a279a
dailymedchlorzoxazonetablet