dimethyl 2-((1-benzyl-4,5-dimethyl-1H-pyrrol-3-yl)methyl)-2-(but-2-yn-1-yl)malonate

dimethyl 2-(but-2-yn-1-yl)-2-((1-(2-methoxybenzyl)-4,5-dimethyl-1H-pyrrol-3-yl)methyl)malonate

2,2-Di-but-2-ynyl-malonic acid

methyl N-(nona-2,7-diyn-5-oyl)anthranilate