abstract |
PURPOSE: A compound I [A is C=0, CH-O-R 3 (R 3 is acyl, fuorosaminyl residue); R 1 is protected aldehyde having a form of cyclic acetal or cyclic thioacetal; R 2 is H, lower acyl; dotted line is double bond, or oxirane ring; chain line denotes 16 or 17-membered macrolactone ring.); e.g. demycarosyl10-propionyl josamycin ethyleneacetal. n COPYRIGHT: (C)1978,JPO&Japio |