abstract |
The invention relates to compounds of formula (I), wherein a, b, c, d, e, R<SUP>1</SUP>, R<SUP>2</SUP>, A<SUP>1</SUP>, A<SUP>2</SUP>, A<SUP>3</SUP>, A<SUP>4</SUP>, Y<SUP>1</SUP>, Y<SUP>2</SUP>, Y<SUP>3</SUP>, Z<SUP>1</SUP>, Z<SUP>2</SUP>, Z<SUP>3</SUP>, Z<SUP>4 </SUP>and<SUP/> ---- a |