Table 1.
Compounds identified in C. papaya leaf extract.
| No | tR (min) | [M−H]−/[M−H]+ (m/z) | MS2 (m/z) | Assignment |
|---|---|---|---|---|
| 1 | 0.26 | nd/381.0846 | LOW INTENSITY | Unidentified |
| 2a | 0.29 | 133.016/nd | 133, 115, 89, 87, 73 | Malic acid |
| 2b | 0.30 | 191.0214/nd | 191, 173, 149, 129, 111, 87, 85 | Quinic acid |
| 3 | 2.93 | nd/256.1935 | 256, 238, 220, 218, 122, 108 | Unidentified |
| 4 | 3.04 | LOW INTENSITY | nd | Unidentified |
| 5 | 3.22 | 447.1533/nd | LOW INTENSITY | Unidentified |
| 6 | 3.32 | 295.0484/nd | 295, 277, 195, 179, 146, 135, 133, 115, 89 | Caffeoyl malate |
| 7 | 3.37 | LOW INTENSITY | nd | Unidentified |
| 8 | 3.86 | 755.2078/757.2274 | 755, 301, 300, 271, 255, 179, 151 | Quercetin-3-O-(2'',6''-di- O-rhamnopyranosyl)glucopyranoside (manghaslin) |
| 9 | 3.94 | 279.0531/nd | 279, 163, 133, 119, 115, 93 | p-Coumaroyl malate (Isomer 1) |
| 10 | 4.06 | 279.0535/nd | 279, 163, 133, 119, 115, 93 | p-Coumaroyl malate (Isomer 2) |
| 11 | 4.16 | 739.2128/741.2327 | 739, 284, 285, 255, 227, 151, 133 | Kaempferol-3- O-(2'',6''-di-O-rhamnopyranosyl)glucopyranoside (clitorin) |
| 12 | 4.24 | 609.1479/611.1684 | 609, 301, 300, 271, 255, 179, 151 | Quercetin-3- O-rutinoside (rutin) |
| 13 | 4.28 | 309.0630/nd | 309, 291, 247, 197, 193, 149, 134, 133, 115 | Feruloyl malate (Isomer 1) |
| 14 | 4.37 | 309.0637/nd | 309, 291, 247, 197, 193, 149, 134, 133, 115 | Feruloyl malate (Isomer 2) |
| 15 | 4.64 | 593.1533/nd | 593, 284, 285, 255, 227, 151, 133 | Kaempferol-3- O-rutinoside (nicotiflorin) |
| 16 | 5.25 | nd/386.2125 a | LOW INTENSITY | Unidentified |
| 17 | 5.51 | nd/479.3898 | 479, 240, 222 | Carpaine |
All MS2 were in negative ion mode except for peak no 3, 16 and 17; a [M+H]2+; nd: not detected.