Which of the following is a Diterpene?

Which of the following is a Diterpene?

Diterpenes are a class of chemical compounds composed of four isoprene units, often with the molecular formula C20H32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate.

Which glycosides are sweet glycosides?

These sweet glycosides found in the stevia plant Stevia rebaudiana Bertoni have 40-300 times the sweetness of sucrose. The two primary glycosides, stevioside and rebaudioside A, are used as natural sweeteners in many countries. These glycosides have steviol as the aglycone part.

Is vitamin A diterpene?

Phytol, an oxygenated acyclic diterpene, is an important building block of the chlorophyll molecule, from which it is obtained on treatment with alkali solution. The arrangement of isoprene units in phytol is identical with that in vitamin A, a monocyclic diterpene derivative, and is…

Is vitamin A diterpenoid?

Diterpenoid groups that are physiologically active include: vitamin A activity (retinol), phytohormones that regulate plant growth and germination, e.g. gibberellin, fungal hormones that stimulate the switch from asexual to sexual reproduction, e.g. trisporic acid; disease resistance agents (phytoalexins), e.g. casbene …

Is steviol glycosides better than sugar?

Stevia contains compounds called steviol glycosides that are about 150–300 times sweeter than sugar. However, stevia is so low in calories that it is technically a “zero-calorie” product.

What are diterpenoid alkaloids?

The diterpenoid alkaloids are an unusual group of “secondary metabolites” produced by plants; they can be derived biogenetically from an isoprenoid pathway which in the early stages is probably similar to that used in gibberellic acid biosynthesis, because the stereochemistry of the A/B ring junction between the two …

What kind of terpene is vitamin A?

… Squalene (unsaturated hydrocarbon present in humans, shark), the side chains of Vitamin A, E, K, are all compounds of terpenes.

How is vitamin A formed?

Preformed vitamin A is found in foods from animal sources, including dairy products, fish, and meat (especially liver). By far the most important provitamin A carotenoid is beta-carotene; other provitamin A carotenoids are alpha-carotene and beta-cryptoxanthin. The body converts these plant pigments into vitamin A.