Spiro[11,15-methano-2H,7H,13H-furo[4,3,2-pq][2,6]benzodioxacyclooctadecin-13,2'-[2H]pyran],milbemycin B deriv.; Antibiotic B 41A4; Emamectin A4; Milbemycin A4; Milbemycina3
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