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21441-89-4

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21441-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21441-89-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,4 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21441-89:
(7*2)+(6*1)+(5*4)+(4*4)+(3*1)+(2*8)+(1*9)=84
84 % 10 = 4
So 21441-89-4 is a valid CAS Registry Number.

21441-89-4Downstream Products

21441-89-4Relevant articles and documents

SPECIFICALLY ACTIVATED MICROMOLECULAR TARGET COUPLING BODY IN TUMOR MICROENVIRONMENT AND USE THEREOF

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, (2017/07/14)

Provided are an anticancer compound comprising a cleavable linker specifically activated in a tumor microenvironment, and use thereof. The anticancer compound is represented by the following formula, wherein, R1 is a normal functional group or a protection group; R2 is Ala, Thr, Val or Ile; R3 is Ala, Val or Asn; R4 is a drug group linked via a hydroxyl group or an amino group; and the general formula of the drug is R4H. The anticancer compound is only activated at a local portion of a tumor, thus avoiding the defect of immune system damage of a traditional chemotherapeutic drug, and promoting tumor immunization by removing a tumor immunosuppression cell. The anticancer compound or pharmaceutical composition thereof is jointly used with immunotherapy, thus improving the effect of treating the tumor, and effectively inhibiting tumor metastasis and osseous metastasis.

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