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  1. ajith
    ajith at | | Reply

    OK good for me satisfied. After seen that

  2. HK Najmee
    HK Najmee at | | Reply

    Thanks for sharing and refreshing all basics of Organic Chem.
    Keep it up!

  3. aurora cabanilla
    aurora cabanilla at | | Reply

    thank you so much for sending me about organic chemistry subject.its really help me remind the chemical reaction of an atom

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