Abstract
The E,E-germacranolide hanphilline has been photochemically transformed into its Z,Z-isomer; an X-ray structural study has shown that the ten-membered ring in this compound adopts the previously unknown 15D5,1D14 boat-boat conformation.
Photochemical Transformation of Hanphilline and Crystal Structure of 1(10)Z,4Z-Hanphilline
1994
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