a) Paper chromatography was carried out on paper Whatman No 1, solvent system butanolacetic acid (10%). b The size of the molecule was confirmed by mass spectrometry. C Calculated: 65-78% C, 5'52% H, 3'65% N; found: 65'93% C, 5'68% H, 3'34% N. d Calculated: 66-49% C, 5-83% H, 3-52% N; found: 66'53% C, 5'67% H, 3'18% N.
