Noun
English Wikipedia has an article on:transesterificationWikipedia
transesterification (plural transesterifications)
(organic chemistry) The reaction of an ester with an alcohol in order to replace the alkoxy group; it is used in the synthesis of polyesters and in the production of biodiesel
It is also used for producing biodiesel via transesterification reaction. Source: Internet
Both steps involve transesterification reactions that occur between RNA nucleotides. Source: Internet