Table 5. Hydrogen-bond geometry (Å, °) for (4a) .
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N3—H3⋯O4 | 0.901 (17) | 1.903 (16) | 2.6919 (13) | 145.0 (15) |
| C312—H312⋯O3 | 0.95 | 2.37 | 2.9441 (17) | 119 |
| C2—H2⋯O4i | 0.95 | 2.47 | 3.212 (3) | 134 |
| C316—H316⋯O3ii | 0.95 | 2.33 | 3.201 (2) | 152 |
Symmetry codes: (i)
; (ii)
.