71. Among the following amino acids, the (R) -enantiomer is represented by
72. The major product of the acetylation of salicylic acid with Ac2O/H+ followed by heating with anhydrous AlCl3 is
73. The major stereoisomer obtained in the reaction of (S)-2 phenylpropanal with MeMgBr is
74. The major stereoisomer P obtained in the following reaction is
75. The major product P of the following reaction is
76. The major product P of the given reaction is
77. In the following reaction,
the major product [X] is
the major product [X] is
78. In the following reaction sequence,
the major product [X] is
the major product [X] is
79. In the following reaction,
the major product [X] is
the major product [X] is
80. Among the bicycle [3.3.0] octane diones given below, which one will exhibit five signals in the broad band decoupled 13C NMR spectrum?
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