Reactions of triacetic acid lactone with carbonyl compounds. X‐Ray structure determination of 3‐acetoacetyl‐2‐chromenone and 3,6,9,12‐tetramethyl‐1H,6H,7H,12H‐6,12‐methanodipyrano[4,3‐b:4,3‐f]‐dioxocin‐1,7‐dione | Publicación