Ivermectin B1a, a derivative of Avermectin B1a , is a main component of Ivermectin . Ivermectin (MK-933) is a broad-spectrum anti-parasite agent. Ivermectin is a candidate therapeutic against SARS-CoV-2/COVID-19 .

In Vitro

Ivermectin belongs to the macrocyclic lactone class of avermectins and consists of a mixture of two homologous compounds, ivermectin B1a (not less than 80%) and ivermectin B1b (not more than 20%). Ivermectin B1a, the major component of Ivermectin, is inactive at a concentration of 0.3 μg/ml, whereas in the case of the minor component, ivermectin B1b, the same concentration produces 100% mortality of snails. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Form:Solid

Specifications

Synonyms

Specifications & Purity

Moligand™, ≥98%

Biochemical and Physiological Mechanisms

Storage

Store at -20°C

Shipped In

Ice chest + Ice pads

This product requires cold chain shipping. Ground and other economy services are not available.

Grade

Moligand™

Purity

≥98%

Names and Identifiers

Canonical Smiles	CCC(C)C1C(CCC2(O1)CC3CC(O2)CC=C(C(C(C=CC=C4COC5C4(C(C=C(C5O)C)C(=O)O3)O)C)OC6CC(C(C(O6)C)OC7CC(C(C(O7)C)O)OC)OC)C)C
IUPAC Name	(1R,4S,5'S,6R,6'R,8R,10E,12S,13S,14E,16E,20R,21R,24S)-6'-[(2S)-butan-2-yl]-21,24-dihydroxy-12-[(2R,4S,5S,6S)-5-[(2S,4S,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-5',11,13,22-tetramethylspiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2'-oxane]-2-one
InChIKey	AZSNMRSAGSSBNP-XPNPUAGNSA-N
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
Isomeric SMILES	CC[C@H](C)[C@@H]1[C@H](CC[C@@]2(O1)C[C@@H]3C[C@H](O2)C/C=C(/[C@H]([C@H](/C=C/C=C/4\CO[C@H]5[C@@]4([C@@H](C=C([C@H]5O)C)C(=O)O3)O)C)O[C@H]6C[C@@H]([C@H]([C@@H](O6)C)O[C@H]7C[C@@H]([C@H]([C@@H](O7)C)O)OC)OC)\C)C
Molecular Weight	875.09
Reaxy-Rn	29304044
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=29304044&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Phenylpropanoids and polyketides
  - Class Macrolides and analogues
    - Subclass Milbemycins

Kingdom	Organic compounds
Superclass	Phenylpropanoids and polyketides
Class	Macrolides and analogues
Subclass	Milbemycins
Intermediate Tree Nodes	Not available
Direct Parent	Milbemycins
Alternative Parents	O-glycosyl compounds Disaccharides Ketals Oxanes Tetrahydrofurans Tertiary alcohols Secondary alcohols Lactones Carboxylic acid esters Oxacyclic compounds Monocarboxylic acids and derivatives Dialkyl ethers Organic oxides Hydrocarbon derivatives Carbonyl compounds
Molecular Framework	Aliphatic heteropolycyclic compounds
Substituents	Milbemycin - Disaccharide - Glycosyl compound - O-glycosyl compound - Ketal - Oxane - Tetrahydrofuran - Tertiary alcohol - Carboxylic acid ester - Lactone - Secondary alcohol - Acetal - Carboxylic acid derivative - Dialkyl ether - Ether - Oxacycle - Organoheterocyclic compound - Monocarboxylic acid or derivatives - Organic oxide - Carbonyl group - Hydrocarbon derivative - Alcohol - Organic oxygen compound - Organooxygen compound - Aliphatic heteropolycyclic compound
Description	This compound belongs to the class of organic compounds known as milbemycins. These are a group of macrolides with a structure containing a 16-membered lactone ring fused to a 1,7-dioxaspiroundecane ring system and to either a benzofuran (or hydrogenated derivative thereof). In some cases (e.g. Milbemycin E), the tetrahydrofuranyl ring is missing. Milbemycins can be o-glycosylated at C13 to form Avermectins. Milbemycins are produced by Streptomyces species.
External Descriptors	macrocyclic lactone
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

3D Structure

Associated Targets(Human)

Huh-7 (12904 Activities)

Lot Number	Certificate Type	Date	Item
G2528274	Certificate of Analysis	Feb 28, 2025	I649946
G2528275	Certificate of Analysis	Feb 28, 2025	I649946
G2528276	Certificate of Analysis	Feb 28, 2025	I649946

Solubility	DMSO : 100 mg/mL (114.27 mM; Need ultrasonic)
Molecular Weight	875.100 g/mol
XLogP3	4.100
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	14
Rotatable Bond Count	8
Exact Mass	874.508 Da
Monoisotopic Mass	874.508 Da
Topological Polar Surface Area	170.000 Å²
Heavy Atom Count	62
Formal Charge	0
Complexity	1680.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	20
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	3
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	3
Covalently-Bonded Unit Count	1

1. Song Lianjun, Wang Youyi, Li Qingyue, Wang Jinkui, Gao Tian, An Zhaohuan, Liu Qinfang, Mao Yexuan, Bu Tong, Huang Xianqing, Ma Yan, Wang Zhanhui, Zhang Xiya. (2023) Production of monoclonal antibody against tylosin and tilmicosin with homogeneous cross-reactivity and its application in lateral flow immunoassay. MICROCHIMICA ACTA, 191 (1): (1-12). [PMID:38114730] [10.1007/s00604-023-06132-z]
2. Hairui Han, Nana He, Enzhuang Pan, Xuelian Tan, Zuwang Yang, Xueqing Li, Dahua Shi, Jingquan Dong. (2023) Disruption of the intestinal barrier by avermectin in carp involves oxidative stress and apoptosis and leads to intestinal inflammation. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY, [PMID:37666586] [10.1016/j.pestbp.2023.105531]
3. Gu Yu-Xin, Yan Tian-Ci, Yue Zi-Xuan, Li Min-Hui, Zheng Hui, Wang Shu-Ling, Cao Jun. (2022) Dispersive Micro-solid-Phase Extraction of Acaricides from Fruit Juice and Functional Food Using Cucurbituril as Sorbent. Food Analytical Methods, 15 (5): (1356-1367). [PMID:] [10.1007/s12161-021-02209-8]
4. Guanqiong Na, Xiaofei Hu, Yaning Sun, Sharon Kwee, Guangxu Xing, Yunrui Xing, Gaiping Zhang. (2020) A highly sensitive monoclonal antibody−based paper sensor for simultaneously detecting valnemulin and tiamulin in porcine liver. JOURNAL OF FOOD SCIENCE, 85 (6): (1681-1688). [PMID:32418205] [10.1111/1750-3841.15136]

Ivermectin B1a - Moligand™, ≥98% , CAS No.71827-03-7

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Overview

Specifications

Documentation

📋 Safety Data Sheet (SDS)

✅ Certificate of Analysis (COA)

📊 Datasheet

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Advanced Data

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