Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C12—H12⋯O2	0.93	2.40	2.993 (3)	121
C21—H21⋯O1	0.93	2.36	2.968 (3)	123
C21—H21⋯O3	0.93	2.50	3.390 (3)	161