Spiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2'- [2H]pyran] Avermectin A1a Derivativ; Ivermectin EP Impurity B
Spiro[11,15-methano-2H,13H,17H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2'- [2H]pyran] Avermectin A1a Derivativ; Ivermectin EP Impurity B