UNUSUAL TRANSFORMATIONS OF 1-VINYL-4,5,6,7-TETRAHYDRO-5-METHYL-4,6- ETHANOPYRROLO[3,2-C]PYRIDINE TO CYCLOHEPTENO[B]PYRROLES UNDER ACETYLATION CONDITIONS Article Varlamov A.V., Borisova T.N., Voskressensky L.G., Brook A.A., Chernyshev A.I. Arkivoc. Vol. 2000. 2000. P. 147-150