"In 1940, for the first time ever, CBD was isolated by a team from the Department of Chemistry at Illinois University. They said it was “toxic”, but it wasn’t active in the cannabis plant. After the discovery of this compound, it wasn’t until 20 years later a scientist had the want, the funds, and the means to do more research on this plant."

https://cbdinstead.com/blogs/cbd-discoveries/...ory-of-cbd