Alpha-carotene

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Alpha-carotene
Identifiers
CAS number	7488-99-5
PubChem	4369188
SMILES	CC1=C(C(CCC1)(C)C)C=CC(=CC=CC(=CC=CC=C (C)C=CC=C(C)C=CC2C(=CCCC2(C)C)C)C)C
Properties
Molecular formula	C40H56
Molar mass	536.873
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Alpha-carotene is a form of carotene with a β-ring at one end and an ε-ring at the other. It is the second most common form of carotene.

v • d • e Carotenoids
Carotenes:	Carotene (Alpha-carotene · Beta-carotene)  · Lycopene · Phytoene • Phytofluene · Neurosporene
Retinoids:	Acitretin · Alitretinoin · Bexarotene · Etretinate · Fenretinide · Isotretinoin · Retinaldehyde · Tazarotene · Vitamin A (Retinol, Tretinoin)
Xanthophylls:	Antheraxanthin · Astaxanthin · Canthaxanthin · Citranaxanthin · Cryptoxanthin · Diadinoxanthin · Diatoxanthin · Dinoxanthin  · Flavoxanthin · Fucoxanthin · Lutein · Neoxanthin · Rhodoxanthin · Rubixanthin · Violaxanthin · Zeaxanthin

v • d • e Vitamins (A11)
Fat soluble	A: Retinol - Beta-carotene - Tretinoin - Alpha-carotene D: 7-Dehydrocholesterol → Previtamin D3 → Cholecalciferol (D3) → Calcidiol → Calcitriol (active form) → Calcitroic acid; Ergosterol → Ergocalciferol (D2); (analogues: Dihydrotachysterol, Calcipotriol, Tacalcitol) E: Tocopherol - Tocotrienol K: Naphthoquinone - Phylloquinone/K1 - Menatetrenone/K2
Water soluble: B vitamins	B1 (Thiamine, Sulbutiamine, Benfotiamine) - B2 (Riboflavin) - B3 (Niacin, Nicotinamide) - B5 (Pantothenic acid, Dexpanthenol, Pantethine) - B6 (Pyridoxine, Pyridoxal phosphate) - B7 (Biotin) - B9 (Folic acid) - B12 (Cyanocobalamin, Hydroxocobalamin, Methylcobalamin, Cobamamide)
Water soluble: other	C (Ascorbic acid) - Choline
see also enzyme cofactors