| No. | X | Molecular | Calculated | Experimental |
|---|---|---|---|---|
| Formula | Mass | Mass | ||
| 6a | p-CN | C19H22N5 | 320.1876 amu | 320.1857 amu |
| 6b | p-CO2Me | C20H24N4O2Na | 375.1797 amu | 375.1791 amu |
| 6c | p-Br | C18H22N4Br | 373.1028 amu | 373.1022 amu |
| Formula | Mass | Mass | ||
| 6d | p-CH3 | C19H24N4Na | 331.1899 amu | 331.1893 amu |
| 6e | p-NO2 | C18H22N5O2 | 340.1774 amu | 340.1767 amu |