Table 1. Selected torsional angles (°) for compounds (Ib), (Ic), (Ie), (IIa), (IId) and (IIe).

Parameter	(Ib)	(Ic)	(Ie)	(IIa)	(IId)	(IIe)
N32—N31—C311—C312	151.1 (3)	137.0 (2)	139.9 (3)	135.1 (2)	149.6 (4)	140.9 (3)
C2—C1—C11—C12	168.8 (2)	−163.4 (2)	−162.8 (3)	166.8 (2)	−172.7 (4)	−171.4 (3)
C13—C14—O14—C17	169.8 (2)	3.5 (3)	−0.4 (4)
C14—O14—C17—C18	−68.7 (3)	−177.1 (2)	−174.7 (3)
C13—C14—N14—N15				−2.7 (3)	−172.6 (5)	−5.0 (6)
C34—C35—O351—C351	−76.7 (3)	−69.3 (3)		70.1 (3)	78.3 (16)
C34—C35—O451—C451					65.0 (12)
C35—O351—C351—C352	157.6 (2)	169.5 (2)		−159.6 (2)	−164 (2)
C35—O451—C451—C45					−163.6 (18)
C34—C35—O351—C352			−70.6 (4)			−71.1 (5)
C35—O351—C352—C351			161.8 (2)			150.9 (3)