Patent ID: 6951938

Claim:
A compound of the formula wherein P is hydrogen, methyl, COOR 16 wherein R 16 is (C 1 -C 6 )alkyl, allyl or 2,2,2-trichloroethyl; —C(═O)NR 5 R 6 ; —C(═O)H, —C(═O)(C 1 -C 6 )alkyl wherein the alkyl moiety may optionally be substituted with from 1 to 3 halo atoms; —COOCH 2 C 6 H 5 , benzyl, t-butoxycarbonyl (t-Boc) or trifluoroacetyl, wherein R 5 and R 6 are each selected, independently, from hydrogen and (C 1 -C 6 ) alkyl, or R 5 and R 6 together with the nitrogen to which they are attached, form a pyrrolidine, piperidine, morpholine, azetidine, piperazine, N—(C 1 -C 6 )alkylpiperazine or thiomorpholine ring, or a thiomorpholine wherein the ring sulfur is replaced with a sulfoxide or sulfone; and R 14 and R 15 are each amino.