Table IV.

Characteristic IR Bands of 10-DAB III and its Solid Forms

Compound	–OH stretching frequency	C═O stretching frequencies
10-DAB III	3466	1723b, 1711b, 1691a
Form I	3448, 3331	1724b, 1705b
Form II	3442, 3396	1722b, 1703b, 1667c
Form III	3550, 3412, 3280	1725b, 1708b, 1682a
Form IV	3470, 3401	1724b, 1712b, 1683a, 1630c

^aWeek stretching vibration

^bStrong stretching vibration

^cAmide C═O stretching