How would you prepare each of the following compounds using either an acetoacetic ester synthesis or a malonic ester synthesis? Show all intermediate structures and all reagents. 000H 18. Mescaline is a hallucinogenic alkaloid isolated from peyote cactus. Synthesize mescaline from 3,4,5- trimethoxytoluene. Show all reagents and all intermediate structures. H,co Н,00 HyCo CHCH NH H300 Hico 19. Propose a synthesis of the anti-inflammatory drug Ibuprofen from benzene. Show all reagents and all intermediate structures. Assume that ortho and para isomers can be separated. CHy