Abstract
A comparative study on the phytochemical composition of the n-hexane and chloroform extracts from Wisteria sinensis leaves collected in June and October is described. Continuous extraction in Soxhlet apparatus, as well as ultrasound-assisted technique, was used for the preparation of the extracts. All the extracts were analysed by GC/MS method. As a result, α-tocopherol was identified as the main component (56%) of the extracts from October leaves, whereas, β-sitosterol was identified as the main compound (47%) in the extracts from the June leaves. Additionally, pure α-tocopherol was isolated from n-hexane extract of the October leaves using column chromatography. A total of 6.25 mg of α-tocopherol was isolated from 1 g of dried leaves. The presence of the vitamin E in extracts from W. sinensis leaves is described here for the first time.
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Claims 5
Claim · model-written summary
α-tocopherol was the main component of October leaf extracts at 56%.
- Taxon
- Wisteria sinensis
Wisteria sinensist0 - Organ / stage
- October leavese0
- Outcome
- α-tocopherole0
- Value
- 56%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“α-tocopherol was identified as the main component (56%) of the extracts from October leaves”
t0“Wisteria sinensis”
Claim · model-written summary
β-sitosterol was the main component of June leaf extracts at 47%.
- Taxon
- Wisteria sinensisWisteria sinensist0
- Organ / stage
- June leavese0
- Outcome
- β-sitosterole0
- Value
- 47%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“β-sitosterol was identified as the main compound (47%) in the extracts from the June leaves”
t0“Wisteria sinensis”
Claim · model-written summary
Pure α-tocopherol was isolated from n-hexane extract of October leaves.
- Taxon
- Wisteria sinensisWisteria sinensist0
- Organ / stage
- October leavese0
- Outcome
- pure α-tocopherole0
- Qualifier
- n-hexane extracte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pure α-tocopherol was isolated from n-hexane extract of the October leaves using column chromatography”
t0“Wisteria sinensis”
Claim · model-written summary
The yield of isolated α-tocopherol was 6.25 mg per gram of dried leaves.
- Taxon
- Wisteria sinensisWisteria sinensist0
- Outcome
- α-tocopherole0
- Value
- 6.25 mge0
- Qualifier
- 1 g of dried leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 6.25 mg of α-tocopherol was isolated from 1 g of dried leaves.”
t0“Wisteria sinensis”
Claim · model-written summary
The authors report vitamin E in W. sinensis leaf extracts for the first time.
- Taxon
- W. sinensisWisteria sinensise0
- Organ / stage
- leavese0
- Outcome
- presence of the vitamin Ee0
- Qualifier
- for the first timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of the vitamin E in extracts from W. sinensis leaves is described here for the first time.”