Заранее спасибо.
Synthesis and stereochemistry of 1-oxa-6-heteraspiro[2.5]octanes. single-crystal analysis of 6-phenyl-1-oxa-6-phosphaspiro[2.5]octane 6-sulfide
Nagichettiar Satyamurthy; K. Darrell Berlin; M. Bilayet Hossain; Dick Van Der Helm
Phosphorus, Sulfur, and Silicon and the Related Elements, Volume 19, Issue 1 , 1984 , pages 113-129
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http://dx.doi.org/10.1080/03086648408077570
