Consumption by A of 2.0 equivalents of periodate within five minutes indicated a pyranoside config~ rati0n. l~ This, coupled with the failure of the N-acetyl derivative of A to consume any periodate, required an amino group at C-3 and, therefore, A was considered to be a methyl 3- amino-3-deoxypentopyranoside. More specifically, it was postulated that A was a 3- aminoxylopyranoside for the following reasons. The formation of a pyranoside from ...