ERN ern (3R,4S,5S,6R,7R,9R,10S,11S,12R,13S,14R)-10-AMINO-6-{[(2S,3R,4S,6R)-4-(DIMETHYLAMINO)-3-HYDROXY-6-METHYLTETRAHYDRO-2H-PY RAN-2-YL]OXY}-14-ETHYL-7,12,13-TRIHYDROXY-4-{[(2R,4R,5S,6S)-5-HYDROXY-4-METHOXY-4,6-DIMETHYLTETRAHYDRO-2H-PYRAN-2-YL]OXY }-3,5,7,9,11,13-HEXAMETHYLOXACYCLOTETRADECAN-2-ONE ERN