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PCOG Lec > Phenols > Flashcards

Phenols Flashcards

1
Q

Test for phenol glycosides

A

Millon’s Test

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2
Q

Millon’s Test is used to test __ or __

A

Phenolic or polar AA

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3
Q

(+) result for Millon’s test

A

peach/salmon/pink color

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4
Q

(+) result for Millon’s test is peach/salmon/pink coloris due to the ___ complex of the ___ derivative

A

Hg (mercuric) complex of the nitrophenyl derivative

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5
Q

Are most tannins and flavonoids phenol glycosides?

A

Yes, their structures are intrinsically phenolic

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6
Q

Are all tannins and flavonoids phenol glycosides?

A

No - only most

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7
Q

Which 2 other major group can be classified as phenol glycosides?

A

Tannins, flavonoids

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8
Q

From which branch did phenol glycosides come from?

A

Chorismate branch

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9
Q

2 immediate precursors of phenolic glycosides

A

Parahydroxybenzoic acid (pHBA) –> parahydroxyphenol

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10
Q

Synonyms - bearberry

A

Rockberry

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11
Q

Scientific name - bearberry

A

Arctostaphylos uva-ursi

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12
Q

Family - bearberry

A

Ericaceae

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13
Q

Constituents - bearberry

A

Arbutin, ericolin

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14
Q

Product of arbutin hydrolysis

A

Hydroquinone

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15
Q

Hydroquinone is the product of the hydrolysis of?

A

Arbutin

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16
Q

Use - bearberry (4)

A

Astringent, diuretic, antiseptic, skin lightening (lotions)

17
Q

Arbutin can inhibit what enzyme?

A

Tyrosinase

18
Q

Which constituent can inhibit tyrosinase?

A

Arbutin

19
Q

Tyrosinase converts what to what?

A

Tyrosine to melanin (pigment)

20
Q

T or F: bearberry has skin-darkening potential

A

F - lightening

21
Q

Component of rockberry responsible for skin-lightening potential

A

Arbutin

22
Q

T or F: Rockberry inhibits tyrosine so it can be used for skin whitening

A

F, tyrosinase

PCOG Lec (6 decks)

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