Delta-2-Avermectin B1a

Chemical Name: (2R,3S,4'S,6S,8'R,10'E,12'S,13'S,16'E,20'R,21'R,24'R)-2-[(2S)-butan-2-yl]-21',24'-dihydroxy-12'-[(2R,4S,5S,6S)-5-[(2S,4S,5R,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-3,11',13',22'-tetramethylspiro[2,3-dihydropyran-6,6'-3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-1(23),10,14,16-tetraene]-2'-one

Smile: O=C(O[C@]1([H])C2)C([C@]/34O)=CC(C)[C@@H](O)[C@@]4([H])OCC3=C/C=C/[C@H](C)[C@H](O[C@@H]5O[C@@H](C)[C@H](O[C@@H]6O[C@@H](C)[C@@H](O)[C@@H](OC)C6)[C@@H](OC)C5)/C(C)=C/C[C@@](C1)([H])O[C@]72C=C[C@H](C)[C@@H]([C@H](CC)C)O7