Chrysergonic Acid

Title: Chrysergonic Acid
CAS Registry Number: 53092-91-4
Molecular Formula: C32H30O14
Molecular Weight: 638.57
Percent Composition: C 60.19%, H 4.74%, O 35.08%
Literature References: Yellow pigment from ergot. Diastereoisomer of secalonic acids.
Properties: Pale yellow needles from chloroform, mp 268-270°; pale yellow plates from glacial acetic acid, mp 250-257°. [a]D20 -3 to +34° (c = 1.11 in pyridine). uv max (glacial acetic acid): 335 nm (log e 4.57). One part sol in 1000 parts boiling chloroform; in 800-1000 parts boiling glacial acetic acid.
Melting point: mp 268-270°; mp 250-257°
Optical Rotation: [a]D20 -3 to +34° (c = 1.11 in pyridine)
Absorption maximum: uv max (glacial acetic acid): 335 nm (log e 4.57)
Status: This monograph has been retired and is no longer subject to revision or update.
Chrysin Chrysoidine Chrysophanic Acid Chymopapain Chymotrypsins