The molecular formula C19H21NO3 (molar mass: 311.37 g/mol, exact mass: 311.1521 u) may refer to:
The molecular formula C19H21NO3 (molar mass: 311.37 g/mol, exact mass: 311.1521 u) may refer to: Nalorphine, also known as N-allylnormorphine 2-OH-NPA Thebaine, also known as paramorphine
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).