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Org. chem. How is this "1-aminopropan-2-ol" and not "3-aminopropan-2-ol"

Org. chem. How is this "1-aminopropan-2-ol" and not "3-aminopropan-example-1
User MikaAK
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you want to achieve the lowest number possible
Because 3-aminopropan-2-ol is bigger than 1-aminopropan-2-ol number wise, so you should name it as 1-aminopropan-2-ol
User Burrito
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