Only try Organic Chemistry Odyssey if you have time, but you don't need it to get 20+ in OC. I never tried Qvault QR, but the Bio and Chem sections are very useful. You came a bit too late because I was selling O-chem Odyssey for real cheap and no one here wants it.
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Anybody have Organic Chemistry Odyssey or DAT Qvault QR section???
