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- W2315206585 abstract "From the heartwood of T. tomentosa Wight et Arn, β-sitosterol, oleanolic acid (VI, R = R1 = H), arjunolic acid (I) and barringtogenol (IV) were isolated and in addition a new tetrahydroxy triterpene mono-carboxylic acid, now named Tomentosic acid. The triacetylmethyl tomentosate was oxidized to the corresponding ketone (XV) which could be reduced by forced Wolff-Kishner method to give methyl arjunolate (III). The above ketone also suffered isomerization in presence of alkali to give an α,β-unsaturated ketone (XVI). Further, during lactonization, the acid gives a trihydroxy anhydrolactone (X). The triacetylmethyl ester may be dehydrated using selenium dioxide to give methyldehydro arjunolate (XIX). From these reactions tomentosic acid is tentatively expressed as 2α,3β,19β,23-tetrahydroxy-olean-12-ene-28-oic acid (XII, R = H)." @default.
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- W2315206585 date "1962-01-01" @default.
- W2315206585 modified "2023-09-27" @default.
- W2315206585 title "Chemistry of terminalia species—VI" @default.
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- W2315206585 doi "https://doi.org/10.1016/s0040-4020(01)92734-6" @default.
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