Robuta

https://nrc-publications.canada.ca/fra/voir/objet/?id=200d96e9-63c4-4fe7-803a-7abac45f0784 Unsaturated spiro-[gamma]-lactone formation by the dissociative reduction of bromoacetates -... Unsaturated spiro-[gamma]-lactone formation by the dissociative reduction of bromoacetates by thespirogammalactoneformation