Table 1 Characterization of 23 compounds in the ethyl acetate extract of J. Procumbens by HPLC–DAD–ESI–MS
From: Screening for cytotoxic chemical constituents from Justicia procumbens by HPLC–DAD–ESI–MS and NMR
RT (min) | λmax (nm) | Formula | Parent ion | Exact molecular weight | Fragmentation | Identification | |
|---|---|---|---|---|---|---|---|
1 | 45.5 | – | C29H42O12 | [M+Na]+ | 605.2578 | 421.2211, 403.2114, 385.2000, 181.0855, 151.0759 | Glycoside of compound 6 |
2 | 45.8 | – | C28H40O11 | [M+Na]+ | 575.2471 | 391.2113, 355.1881, 165.0916, 151.0760 | Glycoside of compound 7 |
3 | 57.9 | 262 | C26H26O11 | [M+Na]+ | 537.1351 | 353.1012, 335.0906, 307.0968 | Procumbenoside L |
4 | 63.1 | 257 | C27H26O12 | [M+Na]+ | 565.1319 | 381.0953, 337.1061 323.0912, 307.0951 | Justicidinoside C |
5 | 67.8 | 265 | C27H28O12 | [M+Na]+ | 567.1475 | 383.1113, 369.1001, 365.0987, 339.1217, 337.1064 | Procumbenoside K |
6 | 71.5 | – | C23H32O7 | [M+Na]+ | 443.2026 | 403.2015, 385.2002, 247.0938, 217. 0828, 181.0851, 151.0760 | 5-methoxy-4,4′-di-O-methylsecolariciresinol |
7 | 73.3 | – | C22H30O6 | [M+Na]+ | 413.1920 | 373.1999, 355.1888, 217.0831, 165.0911, 151.0754 | Secoisolariciresinol dimethyl ether |
8 | 74.0 | 263 | C28H28O13 | [M+Na]+ | 595.1420 | 411.1063, 367.1164, 337.1056 | Justicidinoside B |
9 | 75.4 | 264 | C32H34O16 | [M+H]+ | 675.1892 | 513.1393, 381.0951 | Procumbenoside B |
10 | 87.5 | 265 | C31H32O15 | [M+H]+ | 645.1806 | 513.1393, 381.0952 | Procumbenoside H |
11 | 97.8 | 263 | C26H24O11 | [M+H]+ | 513.1395 | 381.0951 | Tuberculatin |
12 | 110.1 | 279 | C25H34O8 | [M+Na]+ | 485.2140 | 403.2097, 385.1991, 181.0853, 151.0757 | 5-methoxy-4,4′-di-O-methylsecolariciresinol-9′-monoacetate |
13 | 111.5 | 282 | C24H32O7 | [M+Na]+ | 455.2024 | 395.1824, 373.1992, 355.1904, 165.0904, 151.0758 | Secoisolariciresinol dimethyl ether monoacetate |
14 | 131.4 | 264 | C26H34O9 | [M+Na]+ | 513.2113 | 371.1845, 339.1584, 233.0795, 217.0843, 177.0910, 167.0702, 151.0758 | Justin C |
15 | 131.5 | – | C28H26O12 | [M+H]+ | 555.1495 | 513.1407, 381.0947 | Diphyllin apioside-5-acetate |
16 | 149.0 | 258 | C21H16O6 | [M+Na]+ | 387.0824 | 335.0899, 321.0749 | Justicidin B |
17 | 155.0 | 201, 228, 278 | C27H36O9 | [M+Na]+ | 527.2250 | 505.2422, 445.2235, 403.2104, 385.1997, 247.0944, 217.0824, 195.1007, 181.0853, 177.0912, 151.0752 | 5-methoxy-4,4′-di-O-methylsecolariciresinol diacetate |
18 | 156.2 | 201, 230, 280 | C26H34O8 | [M+Na]+ | 497.2147 | 355.1899, 325.1806, 313.1792, 269.1535, 217.0839, 195.1005, 165.0902, 151.0753 | Secoisolariciresinol dimethyl ether diacetate |
19 | 159.2 | 262 | C22H18O7 | [M+H]+ | 395.1108 | 365.1015, 351.0859, 319.0972 | Chinensinaphthol methyl ether |
20 | 168.3 | 262 | C22H18O7 | [M+H]+ | 395.1110 | 365.1007 | Neojusticin B |
21 | 169.9 | 282 | C26H32O9 | [M+Na]+ | 511.1916 | 387.1791, 369.1693, 247.0931, 201.0521, 195.1009, 181.0851, 151.0759 | (−)-dihydroclusin diacetate |
22 | 171.0 | 284 | C25H30O8 | [M+Na]+ | 481.1809 | 339.1580, 201.0527, 177.0904, 165.0910, 151.0753, 135.0449 | 2,3-demethoxysecisolintetralin acetate |
23 | 171.7 | – | C20H12O6 | [M+H]+ | 349.0648 | 305.0795 | Justicidin E |