Consider the enolization (Scheme 3.26) of the methyl ester of acetoacetic acid, a reaction involving ketol-enol tautomerism.

While some new mothers can dismiss baby fat as a rite of passage, entertainers are expected to bounce back to their former thin, glamorous selves at lightning speed.

Like the activities of British Railways Research Department, developing, testing and modifying diesel locomotives before their acceptance for service is another behind-the-scenes activity which is a closed book to most passengers and to many railwaymen.

... This little bird is tired of singing a shadow-love song It's my heart you're breakin' and your liein' I ain't takin' If you think I'm going to give you my all, you're mistaken Three years I've been yearning for you Three years I've been learning from you .[…]