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

Cg1 is the centroid of the S1/C4–C7 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H3A⋯O5	0.82 (1)	1.94 (2)	2.729 (3)	162 (3)
O3—H3B⋯O1i	0.82 (1)	1.89 (2)	2.693 (2)	165 (3)
O4—H4⋯O2	0.84 (1)	1.78 (2)	2.614 (3)	177 (4)
C7—H7⋯Cg1ii	0.93	3.10	3.869 (3)	141

Symmetry codes: (i) ; (ii) .