26535-36-4 2H,8H-Benzo[1,2-b:3,4-b']dipyran-6-propanoic acid, 5-methoxy-2,2,8,8-tetramethyl- 2H,8H-Benzo[1,2-b:3,4-b']dipyran-6-propionic acid, 5-methoxy-2,2,8,8-tetramethyl- Acide eriostemoique Eriostemoic acid NSC83436