Patent ID: 8227429

Claim:
A solid crystalline 20,23-dipiperidinyl-5-O-mycaminosyl-tylonolide form having the following characteristics: an FT-Raman spectrum comprising an absorption band at a frequency of each of about 2935, about 1633, about 1596, about 1712, about 1683, and about 781 cm −1 ; a powder X-ray diffraction spectrum comprising a peak at each of 5.0 (±0.2) and 5.6 (±0.2) degrees 2Θ; an attenuated total reflection infrared spectrum comprising an absorption band at a frequency of each of about 2932, about 1711, about 1682, about 1635, about 1599, about 1442, about 1404, about 1182, about 1079, about 1053, about 1008, about 985, about 842, and about 783 cm −1 ; and a melting point of from about 192° C. to about 195° C.