Patent ID: 6635318
Filing Date: 2003-10-21
Classification: C09K

Abstract:
A tetracyclic or pentacyclic compound of the formula I whereinR1 and R2 are each, independently of one another, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or monosubstituted to perhalosubstituted by halogen, wherein one or more CH2 groups in these radicals are optionally, in each case independently of one another, replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COâ€”Oâ€”, â€”Oâ€”COâ€” or â€”Oâ€”COâ€”Oâ€” such that the O atoms are not linked directly to one another,Z is â€”OCF2â€”, â€”CF2Oâ€” or a single bond, L1, L2, L3 and L4 are each, independently of one another, H or F, and, m is 1 or 2.