| abstract |
Paramagnetic ferric complexes of formula (I) are new where, R1 and R2 = H, CHR3OR4 or COOH, but not both H; R3 = H, 1-4C alkyl or COOH; R4 = H or 1-4C alkyl. Tris(2-hydroxymethyl- 4(1H)-pyridon-3-olato) iron (III) is specifically claimed. USE - (I) are useful as contrast agents for MR imaging, esp. of the uorgenital tract. |