Abstract
Three new compounds orizaanthracenol (1-methoxyanthracen-2-ol, 1), 1-hydroxy-7-((2S,3R,4R,5S)-2'',3'',4''-trihydroxy-5''-(hydroxymethyl)tetrahydro-2H-pyran-1-yloxy)anthracen- 2-yl 3',7'-dimethyloctanoate (2) and 1-hydroxy-7-((2S,3R,4R,5S)-2'',3'',4''-trihydroxy-5''-(hydroxymethyl)tetrahydro-2H-pyran-1-yloxy)anthracen- 2-yl 3',7',11',15',19'-pentamethyltricosanoate (3) have been isolated and determined from the rice hulls of Oryza sativa. The structures of the compounds were elucidated using 1D and 2D NMR spectral methods, viz: 1H-NMR, 13C-NMR, DEPT, COSY and HSQC, and HMBC aided by IR, EIMS and FAB-MS. These isolated compounds were tested in bioassay on germination of radish to detect their inhibitory activities, in which compound 1 exhibited the most inhibition at the concentration of 40 ppm was 50.96% of total dry weight. Furthermore, germination and growth of radish were reduced by 27 to 48%, and dry weight of shoot and root were arranged from 50 to 52%, whilst compounds 2 and 3 exhibited weak inhibition than 1.
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Claims 5
Claim · model-written summary
Three new anthracene compounds, including orizaanthracenol, were isolated from rice hulls.
- Taxon
- Oryza sativa
Oryza sativae2 - Compound
- orizaanthracenole1
- Outcome
- isolatede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Three new compounds orizaanthracenol (1-methoxyanthracen-2-ol, 1)”
e2“have been isolated and determined from the rice hulls of Oryza sativa”
Claim · model-written summary
Compound 1 at 40 ppm inhibited radish germination and growth by 50.96% of total dry weight.
- Taxon
- radish
Raphanus sativuse2 - Treatment
- compound 1e1
- Outcome
- inhibitione1
- Direction
- the moste1
- Value
- 50.96%e1
- Qualifier
- at the concentration of 40 ppme1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“compound 1 exhibited the most inhibition at the concentration of 40 ppm was 50.96% of total dry weight”
e2“These isolated compounds were tested in bioassay on germination of radish”
Claim · model-written summary
Compounds from rice hulls reduced radish germination and growth by 27 to 48%.
- Taxon
- radishRaphanus sativuse1
- Outcome
- germination and growth of radishe2
- Direction
- reducede2
- Value
- 27 to 48%e2
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolated compounds were tested in bioassay on germination of radish”
e2“germination and growth of radish were reduced by 27 to 48%”
Claim · model-written summary
Compounds from rice hulls reduced radish shoot and root dry weight by about 50 to 52%.
- Taxon
- radishRaphanus sativuse1
- Outcome
- dry weight of shoot and roote2
- Direction
- decreaseinferrede2
- Value
- 50 to 52%e2
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These isolated compounds were tested in bioassay on germination of radish”
e2“dry weight of shoot and root were arranged from 50 to 52%”
Claim · model-written summary
Compounds 2 and 3 showed weaker radish growth inhibition than compound 1.
- Taxon
- radishRaphanus sativuse2
- Treatment
- compounds 2 and 3e3
- Outcome
- inhibitione3
- Direction
- weake3
- Comparator
- compound 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“compound 1 exhibited the most inhibition at the concentration of 40 ppm was 50.96% of total dry weight”
e2“These isolated compounds were tested in bioassay on germination of radish”
e3“compounds 2 and 3 exhibited weak inhibition than 1”