The transformation shown below can be accomplished in TWO reaction steps. From the following list, select the two reagents (or sets of reagents) which would most effectively bring about this conversion. Reagents:
1. Conc H2SO4/heat
2. CN-
3. KMnO4
4. (i) CH3MgI (ii) H3O+
5. PBr3
6. (i) BH3 (ii) H2O2
7. CH3CH2O-/CH3CH2OH
8. H2O/H+
9. OH-/H2O
10. (i) O3 (ii) Zn
11. NaBH4
12. HCl
13. KI
14. Na
15. CH3CH2Br
Please enter the reagent number (from the above list) for each of the two steps in the following synthesis:
Step 1:
Step 2:
CH3-CH2-CHO (Step 1)-> (Step 2)-> CH3CH2COCH3
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