Table 3.
Main compounds identified in Hibiscus syriacus flower hydromethanolic extract by GC–MS.
| Peak | Rt (min) | Area (%) | Assignments |
|---|---|---|---|
| 3 | 5.085 | 1.56 | 2-cyclopenten-1-one, 2-hydroxy |
| 6 | 6.156 | 1.95 | 2-pentanone, 4-hydroxy |
| 7 | 6.954 | 1.31 | propanal, 2-methyl-, dimethylhydrazone |
| 8 | 7.563 | 1.32 | 3H-pyrazol-3-one, 2,4-dihydro-2,4,5-trimethyl- |
| 9 | 7.753 | 1.24 | pentanal |
| 11 | 8.561 | 4.15 | 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one (or DDMP-4-one) |
| 12 | 8.887 | 0.65 | 5,6-epoxy-6-methyl-2-heptanone |
| 14 | 9.778 | 2.57 | 5-hydroxymethylfurfural |
| 15 | 10.319 | 0.82 | nonanoic acid |
| 17 | 12.836 | 1.00 | methylparaben |
| 19 | 18.026 | 2.59 | hexadecanoic acid, methyl ester |
| 20 | 18.415 | 5.32 | n-hexadecanoic acid |
| 21 | 19.666 | 3.61 | 9,12-octadecadienoic acid, methyl ester |
| 22 | 19.730 | 2.41 | 9,12,15-octadecatrienoic acid, methyl ester |
| 23 | 20.036 | 1.04 | 9,12-octadecadienoic acid |
| 24 | 20.105 | 1.04 | 9,12,15-octadecatrienoic acid |
| 25 | 21.814 | 0.54 | 9,12-octadecadienoic acid, methyl ester |
| 28 | 23.055 | 1.69 | tetracosane |
| 29 | 23.177 | 1.67 | hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester |
| 30 | 24.399 | 1.46 | 1-tetracosanol |
| 32 | 24.564 | 7.08 | heptacosane |
| 35 | 25.538 | 0.61 | squalene |
| 36 | 25.830 | 4.76 | 1-tetracosanol |
| 37 | 25.884 | 4.92 | 1-tetracosanol |
| 38 | 25.966 | 15.27 | 1-heptacosanol |
| 40 | 26.653 | 2.04 | Z-12-pentacosene |