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International Journal of Phytomedicine and Phytotherapy

Fig. 2 | Clinical Phytoscience

Fig. 2

From: A preliminary study of the efficacy of the polyherbal preparation Sao Thong Tai for erectile dysfunction among elderly men: a double-blind, randomized controlled trial

Fig. 2

Chromatogram of the contents of Sao Thong Tai (STT) capsules with characteristic peaks representing the active ingredients: peaks 1-3) D. aegyptium; peak 4) S. acuta; peaks 5-7, 9-11) B. rotunda; and peak 8) O. sativa. Each capsule contained the following markers: peak 7, pinocembrin 0.28 mg; peak 9, cardamonin 0.29 mg; and peak 10) pinostrobin 0.43 mg. The chromatographic conditions were characterized as follows: stationary phase, VDSpher PUR 100 C18-E, 250 x 4.6 mm i.d., 5 μm; mobile phase, A: 2% (v/v) acetic acid in water; mobile phase, B: acetonitrile; gradient: 0 to 20% B in 10 min, 20% B for 5 min, to 60% B in 15 min, to 80% B in 10 min, to 100% B in 10 min, 100% B for 10 min; flow-rate 1 mL min-1; detection, 254 nm; and injection volume 20 μL

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