Arjunolitin, a triterpene glycoside fromTerminalia arjuna

Antibacterial compounds from Planchonia careya leaf extracts

“…Although structurally similar to arjunolic acid (2␣,3␤,23-trihydroxyolean-12-en-28-oic acid), the 13 C NMR shifts of C-3, C-23 and C-24 were δ C 86.05, 23.92, and 66.33, respectively, compared with δ C 78.7, 67.2, 14.0, respectively, as reported for the 23-hydroxy isomer (Collins et al, 1992;Kundu and Mahato, 1993). Further, the measured optical rotation of [␣] D −57 • (MeOH, c 0.2) concurred with Yamagishi et al (1988) for hyptatic acid-A and differed greatly from the [␣] D +63 • (EtOH, c 1.08) reported for arjunolic acid (Tripathi et al, 1992). The determined melting point was 220-223 • C.…”

Cytotoxic and Antimicrobial Activities of Two New Triterpenoids From the Peels of Local Egyptian Malus Domestica L.

“…Therefore, the structure of the isolated compound (Figure 1) was assigned based on the chemical shifts obtained from 1D, 2D ( 1 H and 13 C NMR) which revealed the presence of 30 carbons typical of friedelane skeleton. [18][19][20] To the best of our knowledge, this is the first report of the presence of friedelin in peels M. domestica. Compound 2 was identified as betulinic acid respectively, by comparison of their NMR, MS and physical data with those described in the literature.…”

“…The comparison of the NMR spectral features of the existing literature. 18,19 suggests that the isolated compound is a pentacyclic triterpene. Therefore, the structure of the isolated compound (Figure 1) was assigned based on the chemical shifts obtained from 1D, 2D ( 1 H and 13 C NMR) which revealed the presence of 30 carbons typical of friedelane skeleton.…”

Triterpenoids and flavonoids from Cecropia schreberiana Miq. (Urticaceae)

“…The dried EtOAc residue (4.6 g) was subjected to Sephadex LH-20 CC eluting with MeOH to give seven fractions (A–G). Fraction B (1.18 g) was repeatedly chromatographed on silica gel open columns to produce pomolic acid ( 1 , 6.5 mg) (Saimaru et al, 2007), tormentic acid ( 2 , 12 mg) (Saimaru et al, 2007), α-amyrin ( 3 , 8.5 mg) (Mahato et al, 1994), and arjunolic acid ( 4 , 2 mg) (Tripathi et al, 1992). Fraction D (75 mg) was subjected to silica gel CC, and further separated by semi-preparative RP-HPLC [MeOH-H 2 O (35:65)] to afford vitexin ( 5 , 8 mg) (Zhang and Xu, 2002).…”