Patent ID: 8420683

Claim:
A compound of formula [1] wherein R 1 is —Z—R 11 with Z is O or S or S(O) or S(O) 2 and R 11 is —C(O)R 111 or —S(O)R 111 or —S(O) 2 R 111 or wherein R 1 is and wherein p has the value 1, 2, 3, 4, 5 or 6 and wherein R 4 and R 5 are independently chosen from the list consisting of —CH 3 , —CH 2 CH 3 , —CH 2 CH 2 CH 3 , —C 6 H 6 , lower alkyl, aryl or wherein R 4 and R 5 are connected to each other to form a ring chosen from the list consisting of —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 — and —CH 2 ACH 2 — wherein A is —(CH 2 ) q O—, —(CH 2 ) q S—, —(CH 2 ) q S(O)—, —(CH 2 ) q S(O) 2 — with q is 0, 1, 2, 3 or 4; and R 2 is —H or —C(O)R 22 or —S(O)R 22 or —S(O) 2 R 22 ; and R 3 is —H or —C(O)R 33 or —S(O)R 33 or —S(O) 2 R 33 ; and wherein R 111 , R 22 and R 33 are independently chosen from the list consisting of —H, —CH 3 , —CH 2 X, —CHX 2 , —CX 3 , —C 6 H 6 , —C 6 H 5 X, —C 6 H 4 X 2 lower alkyl and aryl, wherein X represents Br, CH 3 , C 2 H 5 , Cl, F or I, with the proviso that R 2 and R 3 are not —H when Z is S and R 11 is —C(O)CH 3 ; and wherein R 7 is chosen from the list consisting of —CH 3 , —CH 2 CH 3 , —CH 2 CH 2 CH 3 , —C 6 H 6 , lower alkyl, aryl and substituted derivatives thereof.