Thesinine is a

pyrrolizidine alkaloid Pyrrolizidine alkaloids (PAs), sometimes referred to as necine bases, are a group of naturally occurring alkaloids based on the structure of pyrrolizidine. Their use dates back centuries and is intertwined with the discovery, understanding, and e ...

first isolated from '' Thesium minkwitzianum'' from which it derives its name. It is also found in the flowers and seeds of

borage Borage ( or ; ''Borago officinalis''), also known as starflower, is an annual herb in the flowering plant family Boraginaceae native to the Mediterranean region. Although the plant contains small amounts of pyrrolizidine alkaloids, some parts ar ...

References

Pyrrolizidine alkaloids Cinnamate esters {{alkaloid-stub