In nature, polyketides are synthesized by enzymes that effect iterative Claisen condensations. Other thiazolidines may be synthesized by similar condensations. The reaction is especially common in conjunction with the malonic ester synthesis and Knoevenagel condensations. The cycle of its transformations and successive condensations constitutes the life of the universe. Interobjects differ from typical dream condensations in which two objects are fused into one. As a base, it is employed in dehydrohalogenations and various condensations. Like many other esters, this compound undergoes the Claisen ester condensations. He explained natural processes in reference to the rarefactions and condensations of this primary substance. The nephrogenic cords are bilateral condensations of the intermediate mesoderm. Crossed Claisen condensations, in which the enolate and nucleophile are different esters, are also possible. Terminal alkynes are readily converted to many derivatives, e.g. by coupling reactions and condensations. Pyridine is used as a polar, basic, low-reactive solvent, for example in Knoevenagel condensations. Via aldol condensations, benzaldehyde is converted into derivatives of cinnamaldehyde and styrene. Such objects are observed as very bright condensations, which emit mainly millimeter-wave and submillimeter-wave radiation. Via condensations like the Henry reaction, nitroethane converts to several compounds of commercial interest.