1. Signaling Pathways
  2. Antibody-drug Conjugate/ADC Related
  3. ADC Cytotoxin

ADC Payload

ADC cytotoxins (also known as payloads) are cytotoxic agents that induce target cell death in Antibody Drug Conjugates (ADCs). An ADC is a targeted agent composed with a monoclonal antibody, a linker and a cytotoxin. The cytotoxin is the most important component as it determines the potency to kill cancer cells of an ADC.

There are many cytotoxins which are currently being used such as Calicheamicins, Duocarmycins, Pyrrolobenzodiazepines (PBDs), Camptothecins, Daunorubicins/Doxorubicins, Auristatins and Maytansinoids. They can be divided in two classes based on their mechanism of action, DNA damaging agents and tubulin inhibitors. Among them Calicheamicins, Duocarmycins and PBDs are DNA minor grove binders, Camptothecins and Daunorubicins/Doxorubicins are topoisomerase inhibitors, which are DNA damaging agents. Auristatins and Maytansinoids are tubulin inhibitors. Except for the listed cytotoxins, there are numbers of traditional cytotoxic agents with similar mechanisms of killing cancer cells and can also be used in the development of ADCs.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-12456
    Duocarmycin SA
    99.55%
    Duocarmycin SA is an orally active antitumor antibiotic with an IC50 of 10 pM. Duocarmycin SA is an extremely potent cytotoxic agent capable of inducing a sequence-selective alkylation of duplex DNA. Duocarmycin SA demonstrates synergistic cytotoxicity against glioblastoma multiforme (GBM) cells treated with proton radiation in vitro.
    Duocarmycin SA
  • HY-19474
    Maytansinol
    99.84%
    Maytansinol (Ansamitocin P-0) is a derivative of Maytansine. Maytansinol can inhibit tubulin polymerization and induce apoptosis. Maytansinol has antitumor activity. Maytansinol can be used in cancer drug research.
    Maytansinol
  • HY-13631I
    (1S,9R)-Exatecan mesylate
    98.23%
    (1S,9R)-Exatecan mesylate ((1S,9R)-DX8951f) is an isomer of Exatecan mesylate (HY-13631A). Exatecan mesylate (DX8951f) is an inhibitor of DNA topoisomerase I with an IC50 of 2.2 μM (0.975 μg/mL) and can be used in cancer research.
    (1S,9R)-Exatecan mesylate
  • HY-133736
    PROTAC BRD4 Degrader-5-CO-PEG3-N3
    99.73%
    PROTAC BRD4 Degrader-5-CO-PEG3-N3 (Compound 2) is a PROTAC-linker Conjugate for PAC, comprises the BRD4 degrader GNE-987 and PEG-based linker. PROTAC BRD4 Degrader-5-CO-PEG3-N3 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    PROTAC BRD4 Degrader-5-CO-PEG3-N3
  • HY-79256
    MMAF-OMe
    99.62%
    MMAF-Ome, an antitubulin agent, is also an ADC cytotoxin. MMAF-Ome inhibits several tumor cell lines with IC50s of 0.056 nM, 0.166 nM, 0.183 nM, and 0.449 nM for MDAMB435/5T4, MDAMB361DYT2, MDAMB468, and Raji (5T4-) cell lines, respectively.
    MMAF-OMe
  • HY-101127
    SGD-1882
    98.45%
    SGD-1882 is a cytotoxic, DNA minor-groove crosslinking agent pyrrolobenzodiazepine (PBD) dimer, acting as the payload for ADCs.
    SGD-1882
  • HY-15580
    Dolastatin 10
    98.11%
    Dolastatin 10 (DLS 10) is a potent antimitotic peptide that inhibits tubulin polymerization.
    Dolastatin 10
  • HY-79490
    Ac-Exatecan
    98.70%
    Ac-Exatecan is acetylated Exatecan (HY-13631). Exatecan (DX-8951) is a common toxin component in ADC preparation (ADC Cytotoxin) and an inhibitor of DNA topoisomerase I (IC50=2.2 μM).
    Ac-Exatecan
  • HY-131974
    Glucocorticoid receptor agonist-1
    99.80%
    Glucocorticoid receptor agonist-1 is a potent glucocorticoid receptor agonist with an IC50 of 2.8 nM extracted from patent WO2017210471A1, compound 41.
    Glucocorticoid receptor agonist-1
  • HY-B0015S
    Paclitaxel-d5
    ≥98.0%
    Paclitaxel-d5 is a deuterium-labeled Paclitaxel. Paclitaxel is a naturally occurring antineoplastic agent and stabilizes tubulin polymerization.
    Paclitaxel-d<sub>5</sub>
  • HY-15995
    Tubulysin A
    99.08%
    Tubulysin A (TubA) is an anticancer and antiangiogenic agent with anti-microtubule, anti-mitosis and anti-proliferative activity against a variety of cancer cells with IC50 values in the pmol range. It can induce apoptosis of cancer cells and has no effect on normal cells. Tubulysins are a group of potent cytotoxins consisting of nine members (A-I). Tubulysin A can synthesize ADC as ADC Cytotoxin.
    Tubulysin A
  • HY-125586
    β-Amanitin
    β-Amanitin is a cyclic peptide toxin in the poisonous Amanita phalloides mushroom. β-Amanitin inhibits inhibits eukaryotic RNA polymerase II and III. β-Amanitin inhibits protein synthesis. β-Amanitin can be used as a cytotoxic component of antibody-drug conjugates (ADCs).
    β-Amanitin
  • HY-148818
    S-Me-DM4
    99.03%
    S-Me-DM4 is a metabolite of DM4 S-methylated by intracellular enzyme. DM4 (HY-100503) is a microtubule-depolymerizing maytansinoid with strong cytotoxicity. DM4 can be used as an ADC Cytotoxin molecule.
    S-Me-DM4
  • HY-144880
    SC209
    99.52%
    SC209, an ADC cytotoxin extracted from patent WO2021247798, is used in synthesis of anti-EGFR antibody-drug conjugate ADC. SC209 is the payload of STRO-002.
    SC209
  • HY-19791
    N-Acetyl-Calicheamicin
    99.39%
    N-Acetyl-Calicheamicin (N-Acetyl-Calicheamicin γ), an enediyne anti-tumor antibiotic, is an ADC cytotoxin. N-Acetyl-Calicheamicin can induce DNA damage, and can be used in the synthesis of ADC.
    N-Acetyl-Calicheamicin
  • HY-13061
    Daun02
    98.72%
    Daun02 is a proagent of the topoisomerase inhibitor Daunorubicin.
    Daun02
  • HY-161252
    PBD-monoamide
    PBD-monoamide, a modified PBD (pyrrolobenzodiazepine) dimer, is an ADC Cytotoxin. PBD-monoamide can be used for synthesis of DHES0815A (an HER2 ADC). PBD-monoamide has DNA-binding activity and reduces cell viability.
    PBD-monoamide
  • HY-145149
    Duostatin 5
    99.76%
    Duostatin 5 is a cytotoxin designed based on dolastatin, can meet the requirement of serving as an effective cytotoxin in ADC, but has the advantages of fewer synthesis steps, easy operation, less difficulty in quality control and more stable chemical synthesis process. Duostatin 5 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Duostatin 5
  • HY-15581
    MMAD
    98.94%
    MMAD is a potent tubulin inhibitor, is a toxin payload in antibody agent conjugates (ADCs).
    MMAD
  • HY-42487S
    Exatecan Intermediate 1-d5
    99.90%
    Exatecan Intermediate 1-d5 is the deuterium labeled Exatecan Intermediate 1.
    Exatecan Intermediate 1-d<sub>5</sub>
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