主权项 |
1.环孢菌素,其特征在于以下式表示:<img file="C998081550002C1.GIF" wi="1654" he="132" />其中:X为-MeBmt或6,7-二氢-MeBmt-U为-Abu,Nva,Val,ThrY为Sar或(D)-MeSer或(D)-MeAla或(D)-MeSer(OAcyl)Z为(N-R)aa,其中aa={Val,Ile,Thr,Phe,Tyr,Thr(OAc),Thr(OG<sub>1</sub>),Phe(G<sub>2</sub>),PheCH<sub>2</sub>(G<sub>3</sub>),Tyr(OG<sub>3</sub>)}而R>CH<sub>3</sub>和R<C<sub>10</sub>H<sub>21</sub>;G<sub>1</sub>={苯基-COOH,苯基-COOMe,苯基-COOEt};G<sub>2</sub>={CH<sub>2</sub>COOH,CH<sub>2</sub>COOMe(Et),CH<sub>2</sub>PO(OMe)<sub>2</sub>,CH<sub>2</sub>PO(OH)<sub>2</sub>};G<sub>3</sub>={PO(OH)<sub>2</sub>,PO(OCH<sub>2</sub>CH=CH<sub>2</sub>)<sub>2</sub>,CH<sub>2</sub>COOH,CH<sub>2</sub>COOMe(Et)}。 |