Three new sulphate ester salts derived from known coumarin alcohols–one of them tertiary–have been obtained from roots of Seseli libanotis subsp. eu-libanotis . Their structures were established as (2′ S )-rutaretin-1″-sulphate, (3′ R )-lomatin-3′-sulphate and (3′ R ,4′ R )-khellactone-3′-sulphate. They were together with their parent alcohols characterized by 13 C NMR spectroscopy. It is the first report on coumarin sulphates in plants.