has functional parent avermectin B1a 22,23-dihydroavermectin B1a PMID:6148214 PMID:6547280 CHEBI:63941 PDBeChem:IVM (2aE,4E,5'S,6S,6'R,7S,8E,11R,13R,15S,17aR,20R,20aR,20bS)-6'-[(2S)-butan-2-yl]-20,20b-dihydroxy-5',6,8,19-tetramethyl-17-oxo-3',4',5',6,6',10,11,14,15,17,17a,20,20a,20b-tetradecahydro-2H,7H-spiro[11,15-methanofuro[4,3,2-pq][2,6]benzodioxacyclooctadecine-13,2'-pyran]-7-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-alpha-L-arabino-hexopyranosyl)-3-O-methyl-alpha-L-arabino-hexopyranoside VSDB:1455 A macrocyclic lactone that is avermectin B1a in which the double bond present in the spirocyclic ring system has been reduced to a single bond. It is the major component of ivermectin. C48H74O14 chebi_ontology avermectin H2B1a H2B1a 5-O-demethyl-22,23-dihydroavermectin A1a AZSNMRSAGSSBNP-XPNPUAGNSA-N [H][C@@]12C\C=C(C)\[C@@H](O[C@H]3C[C@H](OC)[C@@H](O[C@H]4C[C@H](OC)[C@@H](O)[C@H](C)O4)[C@H](C)O3)[C@@H](C)\C=C\C=C3/CO[C@]4([H])[C@H](O)C(C)=C[C@@]([H])(C(=O)O[C@@H](C1)C[C@]1(CC[C@H](C)[C@]([H])(O1)[C@@H](C)CC)O2)[C@]34O 875.09280 PMID:6125361 ivermectin B1a CAS:71827-03-7 874.50786 InChI=1S/C48H74O14/c1-11-25(2)43-28(5)17-18-47(62-43)23-34-20-33(61-47)16-15-27(4)42(26(3)13-12-14-32-24-55-45-40(49)29(6)19-35(46(51)58-34)48(32,45)52)59-39-22-37(54-10)44(31(8)57-39)60-38-21-36(53-9)41(50)30(7)56-38/h12-15,19,25-26,28,30-31,33-45,49-50,52H,11,16-18,20-24H2,1-10H3/b13-12+,27-15+,32-14+/t25-,26-,28-,30-,31-,33+,34-,35-,36-,37-,38-,39-,40+,41-,42-,43+,44-,45+,47+,48+/m0/s1 Reaxys:4643153 dihydroavermectin B1a PMID:2411323 0 macrocyclic lactone spiroketal