First Botulinum Neurotoxin (IMAGE) Stockholm University Caption Structure of the first botulinum neurotoxin (BoNT/A) discovered in 1897. Credit Pål Stenmark Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.