cryptoxanthin

noun

cryp·​to·​xan·​thin ˌkrip-tə-ˈzan(t)-thən 

: a red crystalline carotenoid alcohol C₄₀H₅₅OH that occurs in many plants (as yellow corn and papaya), in blood serum, and in some animal products (as butter and egg yolk) and that is a precursor of vitamin A