Table 1.
The observed and calculated mass numbers ofLC/ESI-MSpeaks of Stemonae Radix granules
| Peak No. | Rt (min) | Theoretical mass [M + H] + | Observed mass [M + H] + | Mass difference (mmu) | Identification |
|---|---|---|---|---|---|
| 1 | 3.073 | 406.22239 | 406.22642 | -4.03 | Tuberostemoninol/Tuberostemonone |
| 2 | 5.658 | 338.19618 | 338.19668 | -0.50 | 6-Hydroxycroomine/Tuberospironine |
| 3 | 15.040 | 392.24313 | 392.24367 | -0.54 | N-Oxytuberostemonine |
| 4 | 17.402 | 376.24821 | 376.24806 | 0.15 | Tuberostemonine N |
| 5 | 19.311 | 390.22748 | 390.23615 | -8.67 | Stemoninine |
| 6 | 25.729 | 376.24821 | 376.24755 | 0.66 | Tuberostemonine K/Neotuberostemonine/Tuberostemonine/ Tuberostemonine H |