Table 2.
Phenolic moieties identified in ethanolic extract of leaves and trunk of Tecoma species
| Compounds | RT (min) | UV (nm) | [M + H]+ (m/z) | [M-H]− (m/z) | Fragments (m/z) |
|---|---|---|---|---|---|
| T. stans var stans(leaves) | |||||
| Isoverbascoside | 2.57 | 330.6 | 625.75 | 623.66 | 623.45, 461.17, 315.11, 297.21, 161.96 |
| Verbascoside | 2.81 | 329.4 | 625.68 | 623.65 | 623.23, 461.21, 315.14, 297.15, 161.89 |
| T. stans var stans(trunk) | |||||
| Phenylpropanoid glycoside | 2.21 | 324.5 | a- | 639.60 | 639.28, 621.16, 469.35, 459.40, 323.45, 313.19, 179.0, 161.2, 151.25 |
| Olivil | 2.23 | 283.4 | – | 375.51 | b359.31; 341.35; 323.25; 311.29 |
| Isoleucosceptoside A | 2.43 | 285.3, 324.5 | – | 637.21 | 637.21, 475.07, 329.17, 179.26, 160.94 |
| Phenylpropanoid glycoside | 2.45 | 284.4, 324.4 | – | 639.35 | 639.54, 621.35, 487.41, 477.21, 469.35, 459.46, 323.2, 179.13, 161.07 |
| Cycloolivil | 2.53 | 227.5, 279.2 | – | 375.52 | b359.38; 341.35; 323.32; 311.36 |
| Isoverbascoside | 2.56 | 286.1, 330.4 | – | 623.67 | 623.43, 461.12, 315.06, 297.28, 161.90 |
| Crenatoside | 2.75 | 330.5 | 623.67 | 621.63 | 621.41, 459.37, 178.89, 160.89 |
| Verbascoside | 2.81 | 287.5, 327.4 | – | 623.72 | 623.24, 461.06, 315.12, 161.15 |
| Isocrenatoside | 3.11 | 284.2, 327.4 | – | 621.64 | 621.41, 459.12, 179.07, 160.89 |
| Leucosceptoside A | 3.21 | 284.4, 323.5 | – | 637.22 | 637.21, 501.26, 461.23, 175.16, 161.12 |
| Paulownin | 4.73 | 232.1, 285.3 | 371.53 | – | b353.43; 325.46; 323.38; 151.15 |
| Paulownin acetate | 5.71 | 237.4, 286.1 | 413.48 | – | b353.23; 335.27; 325.27; 323.25 |
| Sesamin | 5.91 | 235.1, 286.1 | 355.26 | – | b337.29; 335.40; 319.26; 307.37 |
| T. stansvarangustata(leaves) | |||||
| Isoverbascoside | 2.57 | 327.4 | – | 623.59 | 623.28, 461.17, 315.23, 297.23, 161.77 |
| Crenatoside | 2.75 | 327.5 | – | 621.57 | 621.34, 459.62, 178.95, 161.01 |
| Apigenin | 4.36 | 267.4, 331.5 | 271.37 | 269.22 | 268.94, 151.12, 117.08 |
| Methoxyluteolin | 4.51 | 267.5, 345.5 | 301.43 | 299.40 | 299.06, 284.25, 256.03, 150.81, 147.95 |
| T. stansvarangustata(trunk) | |||||
| Olivil | 2.23 | 283.1 | – | 375.52 | b359.45; 341.28; 323.17; 311.43 |
| Unidentified | 2.35 | 280.3 | – | 581.65 | 581.25, 419.36, 401.17, 233.10, 152.96, 118.87 |
| Isoverbascoside | 2.57 | 330.1 | 625.68 | 623.66 | 623.30, 461.37, 315.0, 297.03, 161.90 |
| Crenatoside | 2.75 | 330.5 | – | 621.63 | 621.34, 459.62, 178.95, 161.01 |
| Verbascoside | 2.81 | 287.4, 327.2 | 625.75 | 623.66 | 623.24, 461.0, 315.12, 161.03 |
| Isocrenatoside | 3.11 | 285.3, 327.5 | – | 621.63 | 621.46, 459.06, 178.82, 161.01 |
| Phenylpropanoid glycoside | 3.23 | 284.1, 325.4 | – | 637.64 | 637.52, 490.93, 475.20, 315.21, 175.22, 161.19 |
| Isomartynoside/Martynoside | 3.36 | 286.5, 327.2 | – | 651.58 | 651.13, 475.31, 328.79, 174.92, 160.0 |
| Paulownin | 4.73 | 232.2, 285.1 | 371.55 | – | b353.43; 325.46; 323.38; 151.15 |
| Paulownin acetate | 5.71 | 237.5, 286.2 | 413.47 | – | b353.23; 335.27; 325.27; 323.25 |
| Sesamin | 5.91 | 235.4, 286.3 | 355.28 | – | b337.29; 335.40; 319.26; 307.37 |
| T. castaneifolia(leaves) | |||||
| Unidentified | 2.35 | 281.4 | – | 581.65 | 581.18, 419.02, 401.4, 232.94, 152.94, 118.91 |
| Isoverbascoside | 2.56 | 285.1, 330.5 | 625.75 | 623.66 | 623.12, 461.12, 315.19, 297.09, 161.0 |
| Verbascoside | 2.81 | 285.3, 327.4 | 625.68 | 623.59 | 623.37, 461.30, 315.12, 161.0 |
| T. castaneifolia(trunk) | |||||
| Olivil | 2.23 | 283.5 | – | 375.52 | b359.30; 341.39; 323.17; 311.43 |
| Unidentified | 2.35 | 280.3 | – | 581.71 | 581.21, 419.12, 401.35, 232.89, 152.97, 118.56 |
| Isoverbascoside | 2.57 | 286.1, 330.3 | – | 623.66 | 623.12, 461.12, 315.19, 297.09, 161.0 |
| T. castaneifolia(trunk) | |||||
| Crenatoside | 2.75 | 330.5 | – | 621.63 | 621.34, 459.62, 178.95, 161.01 |
| Verbascoside | 2.81 | 287.2, 326.5 | – | 623.66 | 623.37, 461.30, 315.12, 161.0 |
| Isocrenatoside | 3.11 | 282.3, 326.6 | – | 621.64 | 621.46, 459.06, 178.82, 161.01 |
| Isomartynoside/Martynoside | 3.36 | 284.2, 323.5 | – | 651.55 | 651.31, 475.51, 329.46, 175.02, 160.91 |
| Paulownin | 4.73 | 232.3, 285.1 | 371.46 | – | b353.43; 325.46; 323.38; 151.15 |
| T. garrocha(leaves) | |||||
| Isoverbascoside | 2.57 | 326.5 | 625.68 | 623.66 | 623.37, 461.12, 315.0, 297.47, 161.03 |
| Rutin | 2.69 | 255.2, 359.3 | 611.77 | 609.61 | 609.09, 301.11 |
| Verbascoside | 2.81 | 314.6 | 625.62 | 623.66 | 623.31, 461.43, 314.78, 161.0 |
| Phenylpropanoid glycoside | 3.23 | 327.1 | 639.60 | 637.83 | 637.46, 461.23, 443.60, 314.83, 175.17, 160.56 |
| Methoxyluteolin glycoside | 3.32 | 265.3, 331.4 | 477.48 | 475.55 | b477.50, 315.65, 301.36 |
| T. garrocha(trunk) | |||||
| Unidentified | 2.35 | 280.5 | – | 581.65 | 581.13, 419.17, 401.8, 232.97, 152.99, 118.94 |
| Isoverbascoside | 2.56 | 330.5 | 625.68 | 623.66 | 623.37, 461.12, 315.0, 297.47, 161.03 |
| Verbascoside | 2.81 | 326.4 | 625.88 | 623.64 | 623.31, 461.43, 314.78, 161.0 |
a(−) ions undetected
bCharacteristic m/z of ions in positive ion mode