Preparation of 13C4-6-methyl anthranilic ester via a Diels-Alder-type process. An experimental and theoretical study to characterize an unexpected isotope exchange

1. Alonso-Gómez, J.L.
2. Pazos, Y.
3. Navarro-Vázquez, A.
4. Lugtenburg, J.
5. Cid, M.M.