The building block of anthraquinone glycosides is acetate

Anthraquinones (AQs) are derived from anthracenes and have two keto groups, mostly in positions 9 and 10 (Fig. 1). The basal compound, anthraquinone (9,10-dioxoanthracene), can be substituted in various ways, resulting in a great diversity of structures. AQs are widely distributed in the plant kingdom (Table I; cf. Zenk and Leistner, 1968). AQs appear in oxidized and reduced (anthrones) form as well as in a free or a combined (glycosidic) state. They are isolated from various plant parts, that is, leaf, stem, root (the principal site of accumulation), pod, seed, coat and embryo, but not endosperm. Naturally occurring AQs possess dyeing and/or pharmacological (purgative) properties.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

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