שליחה במסרון: SYNTHESIS OF 2S,4S,5S-DIHYDROXYPIPECOLIC ACID AND BULGECININE [2S,4S,5R-4-HYDROXY-5-(HYDROXYMETHYL)PROLINE] FROM D-GLUCURONOLACTONE - A STRATEGY FOR THE SYNTHESIS OF 2S,4S-4-HYDROXY-ALPHA-AMINO ACIDS