2-Butenoic acid, 3-methyl-, 1-(5,8-dihydro- 1,4-dihydroxy-5,8-dioxo-2-naphthalenyl)-4-methyl-3-pentenyl ester 23444-70-4 Alkanin b,b-dimethylacrylate Alkanin, .beta.,.beta.-dimethylacrylate Arnebin Arnebin 1 NSC140377