Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O1S—H1B⋯O2 | 0.85 | 1.98 | 2.8166 (14) | 166 |
| O1S—H1A⋯O3Si | 0.85 | 1.92 | 2.7472 (18) | 165 |
| O2S—H2A⋯O1Sii | 0.85 | 1.92 | 2.7650 (17) | 175 |
| O2S—H2B⋯O6 | 0.85 | 1.92 | 2.7703 (16) | 174 |
| O3S—H3B⋯O7 | 0.85 | 2.02 | 2.8647 (16) | 170 |
| O3S—H3A⋯O2Siii | 0.85 | 1.94 | 2.7886 (18) | 172 |
| N3—H3C⋯O4iv | 0.85 | 2.04 | 2.7312 (15) | 138 |
| N3—H3C⋯N4 | 0.85 | 2.31 | 2.6497 (19) | 104 |
| C12—H12⋯O1Si | 0.95 | 2.46 | 3.372 (2) | 160 |
| C15—H15⋯O4iv | 0.95 | 2.52 | 2.965 (2) | 109 |
| C16—H16⋯O2Siii | 0.95 | 2.33 | 3.248 (2) | 162 |
| C17—H17⋯O1v | 0.95 | 2.25 | 3.136 (2) | 155 |
| C18—H18⋯O8vi | 0.95 | 2.50 | 3.331 (2) | 146 |
| C1—O1⋯Cg1vii | 1.22 (1) | 3.49 (1) | 3.9906 (17) | 105 (1) |
| C7—O4⋯Cg2vi | 1.22 (1) | 3.23 (1) | 3.4319 (17) | 89 (1) |
| C1—O1⋯Cg3vii | 1.22 (1) | 3.57 (1) | 3.8161 (18) | 92 (1) |
Symmetry codes: (i) 
; (ii) 
; (iii) 
; (iv) 
; (v) 
; (vi) 
. Cg1, Cg2 and Cg3 are the centroids of the N1/C2–C6, N3/C15–C19 and N4/C20–C24 rings, respectively.