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    (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)but-3-ynoic acid (CAS 1435854-95-7) is supplied as a Fmoc amino acid building block for research and development applications.
    Chemical structure of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)but-3-ynoic acid , CAS 1435854-95-7, AChemBlock AD266863

    (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)but-3-ynoic acid

    Catalog ID: AD266863

    Product Name: (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)but-3-ynoic acid
    CAS: 1435854-95-7
    Purity: 95%
    Appearance: Off-White Powder
    FW: 321.33
    Formula: C₁₉H₁₅NO₄
    Smiles: C#C[C@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)C(O)=O
    (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)but-3-ynoic acid 95%, CAS#: 1435854-95-7, Cat ID: AD266863, AMINO ACID, AChemBlock
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    For research use only. We do not sell to patients
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    Packaging:250MG List Price: $350 Quantity:
    		Total:-- Total_Price($):-- Availability: In Stock San Francisco Estimated Ship Time:

    Aug 03,2026

    Packaging:1G List Price: $750 Quantity:
    		Total:-- Total_Price($):-- Availability: In Stock San Francisco Estimated Ship Time:

    Aug 03,2026

    Packaging:5G List Price: $1,980 Quantity:
    		Total:-- Total_Price($):-- Availability: In Stock Global Estimated Ship Time:

    Aug 14,2026

    update on 07-31-2026

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    Product Information
    Product Information
    Purity 95%
    Appearances Off-White Powder
    Storage Store at 0-8 °C
    Shipping Room Temp.
    MSDS Download MSDS
    IUPAC Name (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)but-3-ynoic acid
    HTS Code
    Smiles C#C[C@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)C(O)=O
    InChiKey YDYYJONIMPFXRE-KRWDZBQOSA-N
    Product Application Used as a Fmoc amino acid building block for medicinal chemistry, SAR studies, custom synthesis, and drug discovery research.
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