Question: What has a structure resembling diferulic acid and is bright yellow?

Context paragraphs:
Bellbrook High School: Bellbrook High School is a public high school in Sugarcreek Township / Bellbrook, Ohio area.  It is the four year high school of the Bellbrook - Sugarcreek Local School District, which is rated Excellent by the Ohio Department of Education.  The school serves grades 9–12.  Their mascot is the Bright yellow Eagle and their colors are purple and bright yellow.  Their primary athletic rivals are Valley View, Oakwood, and Alter High School.

Ctenochaetus flavicauda: Ctenochaetus flavicauda is a tang from the Pacific Ocean.  It occasionally makes its way into the aquarium trade.  It grows to a size of 11.8 cm (4.6 in) in length, making it the smallest ctenochaetus tang, and also the smallest acanthurid.  As a juvenile it is a bright yellow color, as an adult it is reddish-brown color with orange-colored fine horizontal striping, the tail is white and the eye is ringed by bright yellow.

Curcumin: Curcumin is a bright yellow chemical produced by some plants.  It is the principal curcuminoid of turmeric ("Curcuma longa"), a member of the ginger family (Zingiberaceae).  It is sold as an herbal supplement, cosmetics ingredient, food flavoring, and food coloring.  As a food additive, its E number is E100.

Diferulic acids: Diferulic acids (also known as dehydrodiferulic acids) are organic compounds that have the general chemical formula CHO, they are formed by dimerisation of ferulic acid.  Curcumin and curcuminoids, though having a structure resembling diferulic acids', are not formed that way but through a condensation process.  Just as ferulic acid is not the proper IUPAC name, the diferulic acids also tend to have trivial names that are more commonly used than the correct IUPAC name.  Diferulic acids are found in plant cell walls, particularly those of grasses.

Acarospora schleicheri: Acarospora schleicheri, the soil paint lichen, is a bleached to bright yellow areolate to squamulose lichen that commonly grows to 10 cm on soil (terricolous) in arid habitats of southern California and Baja California, also in Europe and Africa.  It produces rhizocarpic acid as a secondary metabolite, which gives it a yellow coloration and serves to protect it from the sun.  Its lower surface is also yellow.  It can be greenish when moist.  Roundish, angular, or irregularly shaped squamules are 0.5–4 mm in diameter.  There are 0–1 (sometimes 2–3) apothecia embedded in the thallus, with 0.4–1.2 mm roundish black to reddish-brown, or dark brown discs, which sometimes fill the areola so as to be lecanorine.  It divides vegetatively on the soil.  Asci are club shaped (clavate) and have 100 or more spherical to ellipsoid spores.  Lichen spot tests are negative, and it is UV+ orange under ultraviolet light.

Mycena crocea: Mycena crocea, commonly known as the walnut mycena, is a species of mushroom in the Mycenaceae family.  The small, inconsequentially edible mushroom has a bright yellow, conical to broadly convex cap up to 15 mm in diameter.  The stem is tough and thin, up to 20 mm tall, bright yellow at the top becoming progressively orange towards the base.  The gills are adnate, subdistant, and yellowish, becoming lighter in age; and the spore print is white.  This mushroom is saprobic and found exclusively on hickory nuts and walnuts in eastern North America.  The specific epithet "crocea" refers to the orange color.  The mushroom is commonly known as the "walnut mycena" and was previously and commonly misidentified as "Mycena luteopallens".

8,5'-Diferulic acid: 8,5'-Diferulic acid is a non cyclic type of diferulic acid.  It is the predominant diferulic acid in sugar beet pulp.  It is also found in barley, in maize bran and rye.  8-5'-Diferulic acid has also been identified to be covalently linked to carbohydrate moieties of the arabinogalactan-protein fraction of gum arabic.

Acacia filicifolia: Acacia filicifolia, commonly known as fern-leaved wattle, is a plant in the legume family, Fabaceae and is native to eastern Australia.  It is a shrub or tree with compound leaves resembling fern fronds, and spherical heads of yellow or bright yellow flowers from autumn to late spring.  It is a common and widespread species, especially on the coast and tablelands of New South Wales.

Decarboxylated 8,5'-diferulic acid: Decarboxylated 8,5'-diferulic acid is a molecule included in the group but is not a true diferulic acid.  It is found in maize bran.

Vulpinic acid: Vulpinic acid is a naturally occurring methyl ester derivative of pulvinic acid found in several lichen species, as well as some non-lichenized fungi.  It was first isolated in 1925.  It is bright yellow, and relatively toxic.

Supporting paragraphs: Diferulic acids Curcumin
Answer: Curcumin