Q:S
B:Origin: it is a semo-synthesized product of fermented Avermectin B1.
W(xu)Q4---4 - ÓS
Chemical name : 4"-epi-4"-deoxy-acetylaminoavermectin B1
ʽͷ
Formula and molecular weight
B1a C5OH75NO14=913
B1b C49H73NO14=899
ƷӋB190%
ingredicnts:the purity of B1 is at least 90% in dry product.