| 主权项 |
1. A compound of formula (I) wherein n is 0 to 4; m is 0 or 1 with the proviso that the sulphur atom and R3 are in vicinal position (if m=0 then R3 is in position 2′, and if m=1 then R3 is on position 1′); R is ethyl or vinyl; R1 is hydrogen or (C1-6)alkyl, R2 is hydrogen or
(C3-6)cycloalkyl, orunsubstituted (C1-6)alkyl, or(C1-6)alkyl substituted by one or more of
hydroxy; preferably one or two,methoxy,halogen,(C3-6)cycloalkyl, or R1 and R2 together with the nitrogen atom to which they are attached form a 5 to 7 membered heterocyclic ring containing at least 1 nitrogen atom or 1 nitrogen and 1 additional heteroatome e.g. selected from N or O, or R1 is hydroxy and R2 is formyl; R3 is OH, OR4, a halogen atom, or
with the proviso that R3 is bound to 2′R3 represents —O—(CH2)p—O— with p is 2 or 3; R4 is unsubstituted (C1-6)alkyl or (C3-6)cycloalkyl. |
