Table 3. Selected Geometric Parameters of AMA (Å, deg).

geometric parameters		geometric parameters
bond lengths (Å)	X-ray	bond angles (deg)	X-ray
C8–O1	1.349 (5)	O1–C8–O2	121.7 (4)
C3–O1	1.411 (4)	O7–C10–O3	121.6 (3)
C8–O2	1.184 (5)	O7–C11–O4	121.4 (3)
C10–O3	1.199 (4)	O5–C19–O6	122.0 (3)
C11–O4	1.195 (3)	C3–O1–C8	118.3 (3)
C16–O5	1.409 (3)	C16–O5–C19	118.1 (2)
C19–O5	1.357 (4)	C1–C10–O7	111.1 (3)
C19–O6	1.196 (4)	C12–C11–O7	111.2 (3)
C10–O7	1.381 (4)	torsion angles (deg)
C11–O7	1.393 (4)	C1–C2–C3–O1	176.4 (3)
C2–C7	1.509 (5)	C14–C15–C16–O5	–176.3 (3)
C8–C9	1.499 (6)	C2–C1–C10–O7	165.9 (3)
C19–C20	1.485 (5)	C17–C12–C11–O7	164.3 (3)