The following road-map problem centers on the structure and properties of A, a key intermediate in these reactions. Give structures for compounds A through J.

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NaBH4 не (1) J I (2) Н,о+ H+ G warm gently (1) CH,MgI (2) H,O+ OH CH,OH ОН ОН (1 еquiv) Tollens reagent A РСС В D (excess) TSOH dil chromic acid PHNHNH, (ехcess) dil H,SO4 Zn (Hg) E HCI C