Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Azlactone intermediates are formed when alpha-amino acids react with acetic anhydrides to produce these in the Dakin-West reaction, while the large ring alicyclic type are produced by the Ruzicka synthesis. Aromatic forms of these are created using organic nitriles in the Houben-Hoesch reaction, and also form from esters in the Fries rearrangement. The methyl type produces a positive result in the iodoform test, and unlike a similar compound, these almost always give a negative result when reacted with Tollens' reagent. Produced by the oxidation of secondary alcohols, for 10 points, name this type of organic compound consisting of a carbonyl attached to two carbon atoms, whose simplest example is acetone.
Science