Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C11—H11B⋯O3i	0.97	2.45	3.410 (2)	168
N1—H1N1⋯O1	0.88 (2)	2.11 (2)	2.5688 (18)	111.9 (16)
O3—H1O3⋯O2ii	0.88 (3)	1.85 (2)	2.6575 (17)	152 (2)
C11—H11A⋯Cg1iii	0.97	2.63	3.438	141
C18—H18A⋯Cg2iv	0.97	2.92	3.805	153

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) . Cg1 is the centroid of the C1,C2,C7–C10 ring and Cg2 is the centroid of C2–C7 ring.