Asterand UK Limited

Christopher G Newton

Alexander W Oxford

George Hynd

Jonathan Mark Sutton

David Edward Clark

Kenneth Lyle Clark

Garry Fenton

Robert Alexander Coleman

Richard Jon Davis

Neil Victor Harris

Keith A J Stuttle

Compounds of formula (I): wherein: Ris H or an optionally substituted Calkyl group; Y is either &#x2014;(CH)&#x2014;X&#x2014;, where n is 1 or 2 and X is O, S, S(&#x2550;O), S(&#x2550;O), or NR, where Ris selected from H or optionally substituted Calkyl, or Y is &#x2014;C(&#x2550;O)NR&#x2014;, where Ris selected from H, and optionally substituted Calkyl or Caryl; Ris an optionally substituted Caryl group linked to a further optionally substituted Caryl group, wherein if both Caryl groups are benzene rings, there may be an oxygen bridge between the two rings, bound adjacent the link on both rings; A is a single bond or a Calkylene group; and Ris either: or wherein R is optionally substituted Calkyl, Caryl or NRR, where Rand Rare independently selected from optionally substituted alkyl;

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Compounds of formula (I): wherein: Ris H or an optionally substituted Calkyl group; Y is either &#x2014;(CH)&#x2014;X&#x2014;, where n is 1 or 2 and X is O, S, S(&#x2550;O), S(&#x2550;O), or NR, where Ris selected from H or optionally substituted Calkyl, or Y is &#x2014;C(&#x2550;O)NR&#x2014;, where Ris selected from H, and optionally substituted Calkyl or Caryl; Ris an optionally substituted Caryl group linked to a further optionally substituted Caryl group, wherein if both Caryl groups are benzene rings, there may be an oxygen bridge between the two rings, bound adjacent the link on both rings; A is a single bond or a Calkylene group; and Ris either:  wherein R is optionally substituted Calkyl, Caryl or NRR, where Rand Rare independently selected from optionally substituted Calkyl;

Compounds of formula (I): wherein: Ris H or an optionally substituted Calkyl group; Y is either &#x2014;(CH)&#x2014;X&#x2014;, where n is 1 or 2 and X is O, S, S(&#x2550;O), S(&#x2550;O), or NR, where Ris selected from H or optionally substituted Calkyl, or Y is &#x2014;C(&#x2550;O)NR&#x2014;, where Ris selected from H, and optionally substituted Calkyl or Caryl; Ris an optionally substituted Caryl group linked to a further optionally substituted Caryl group, wherein if both Caryl groups are benzene rings, there may be an oxygen bridge between the two rings, bound adjacent the link on both rings; A is a single bond or a Calkylene group; and Ris either: or &#x2003;wherein R is optionally substituted Calkyl, Caryl or NRR, where Rand Rare independently selected from optionally substituted Calkyl;

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Harlow, United Kingdom

Christopher G Newton