thumb|400px|The 8 isomers of oxazine
thumb|400px|The 8 isomers of oxazine
Oxazines are heterocyclic organic compounds containing one oxygen and one nitrogen atom in a cyclohexa-1,4-diene ring (a doubly unsaturated six-membered ring). Isomers exist depending on the relative position of the heteroatoms and relative position of the double bonds.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).