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[1]
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[2]
EHRENSTEIN, 1941, J ORG CHEM, V6, P626
[3]
EHRENSTEIN, 1940, J ORG CHEM, V5, P318
[4]
EHRENSTEIN, 1939, J ORG CHEM, V4, P506
[5]
RUZICKA, 1937, HELV CHIM ACTA, V20, P244