Transitions of 2-aminopropionitrile tentatively detected toward Sgr B2(N) or possibly in conflict with the observed spectrum. The latter are indicated with a question mark. The spectrum taken with the IRAM 30 m telescope is shown in black on the main-beam temperature scale. The red spectrum is the LTE prediction for 2-aminopropionitrile based on the parameters listed in Table 5. The red labels are the feature numbers as in Col. 1 of Table 4. The green spectrum is the complete model that includes all molecules detected in the full line survey of Sgr B2(N) so far (except for 2-aminopropionitrile).