Abstract: A disposable cassette tape holder for securing a cassette tape to a file jacket or document is formed from a single sheet of pliable material having two parallel fold lines which define a front, back and fold panels of the holder. The front and back panels of the holder are folded about the fold lines to form a cassette tape holding pocket and, in one embodiment, the cassette tape is releasably held in the holding pocket, and the holder is in turn secured to the file jacket or document, by a light adhesive applied to the panels of the holder. Depending on the placement of the adhesive, the holder can be adhered directly to the top of a file jacket or document, or the file jacket or document can be interleaved between the holder's back panel and the held cassette tape.

Abstract: Rosamicin is an antibiotic elaborated by Micromonospora rosaria. The compounds described herein are antibacterial derivatives of rosamicin. Also described are processes for the preparation of these antibacterial derivatives from rosamicin.