二-丁-2-炔基-胺

1-甲基-1-三甲基甲硅烷基丙二烯

2,3-二甲基马来酸酐

2-(2,3-dimethyl-4-oxo-cyclopent-2-enylidene)-propionic acid

4-[7-(2-butynyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester