Aryl Annulation: A Powerful Simplifying Retrosynthetic Disconnection.

The given text is a collection of scientific documents discussing the synthesis and characterization of various compounds. The compounds mentioned include vinblastine analogues, indoles, Benzofuran 12, compound 12, benzofuran 13, compounds 13 and 14, compounds 15 and 27, the second diastereomer of compound 15, compound 16, compound 17, and compounds 18 and 19. The documents provide detailed procedures for the synthesis of these compounds, as well as information about their physical properties and spectroscopic data. The information presented can be useful for researchers studying these compounds and their properties. [Extracted from the article]