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    • 1. 发明申请
    • MORPHINE AND CODEINE DERIVATIVES FOR USE IN THERAPY
    • 用于治疗的吗啡和代谢衍生物
    • WO1996016063A1
    • 1996-05-30
    • PCT/GB1995002712
    • 1995-11-20
    • BRITISH TECHNOLOGY GROUP LIMITEDMARPLES, Brian, ArthurTRAYNOR, John, Richard
    • BRITISH TECHNOLOGY GROUP LIMITED
    • C07D489/02
    • C07D489/02
    • A compound of formula (I) wherein R1 = H (morphine analogue), CH3 (codeine analogue), R2 = H, alkyl group of 1 to 4 carbon atoms, allyl, cyclopropylmethyl, R3 = a group (A), -O-CH2-R4 (ether), -O-COCH = CHR4 (cinnamate), R4 = (B), wherein X1, X2, X3, X4 and X5 which may be the same or different are separately selected from H, alkyl of 1 to 4 carbon atoms, NH2, NO2, alkoxy group of 1 to 4 carbon atoms, hydroxy, halogen, N-alkyl, group of 1 to 4 carbon atoms, morpholine, or a group COR5 wherein R5 is H, OH, O-alkyl where alkyl is from 1 to 4 carbon atoms, or one of X1 and X2, X2 and X3, X3 and X4 or X4 and X5 together with an alkylene group optionally interrupted by O, S or N of up to 5 atoms in length complete a ring and a pharmaceutically acceptable salt thereof for use in therapy.
    • 式(I)的化合物,其中R1 = H(吗啡类似物),CH3(可待因类似物),R 2 = H,1至4个碳原子的烷基,烯丙基,环丙基甲基,R 3 = A(A) CH2-R4(醚),-O-COCH = CHR4(肉桂酸酯),R4 =(B),其中X1,X2,X3,X4和X5可以相同或不同,分别选自H, 4个碳原子,NH 2,NO 2,1至4个碳原子的烷氧基,羟基,卤素,N-烷基,1至4个碳原子,吗啉或基团COR 5,其中R 5是H,OH,O-烷基 烷基是1至4个碳原子,或者X 1和X 2,X 2和X 3,X 3和X 4或X 4和X 5中的一个与任选被长达5个原子的O,S或N间隔的亚烷基一起形成环 及其药学上可接受的盐用于治疗。
    • 2. 发明申请
    • MAGNETIC RESONANCE APPARATUS HAVING REDUCED &quote;DEAD TIME&quote;
    • 具有减少“死亡时间”的磁共振装置
    • WO1998019175A1
    • 1998-05-07
    • PCT/GB1997002936
    • 1997-10-24
    • BRITISH TECHNOLOGY GROUP LIMITEDLURIE, David, JohnALECCI, MarcelloBRIVATI, John, AnthonyTESTA, LucaPLACIDI, GiuseppeSOTGIU, Antonello
    • BRITISH TECHNOLOGY GROUP LIMITED
    • G01R33/32
    • G01R33/3628
    • The invention concerns an improved magnetic resonance apparatus and method for substantially reducing the dead time of the apparatus, in order to recover as much of the submicrosecond FID signals as quickly as possible. A double-channel, out-of-phase signal combination is employed. Two RF receiving coils are arranged with identical ringing characteristics, preferably mutually perpendicular to one another. The RF signal received by one coil is phase shifted by 180 DEG , amplified, and combined with the amplified RF signal received by the other coil. The ringing components cancel, whilst the FID components in phase quadrature do not. The transmitter/receiver apparatus may be of duplex or crossed coil configuration. In the latter case, one of the receiver coils may be oriented parallel to the main field so that it receives no FID signal and operates only to reduce the dead time. The invention is particularly well suited for imagers and spectrometers using pulsed electron paramagnetic resonance (EPR), for the detection of free radicals in biological systems, or for pulsed nuclear magnetic resonance (NMR), where relaxation times are of the order of 100ns to 10 mu s.
    • 本发明涉及一种改进的磁共振装置和方法,用于大大减少装置的死区时间,以尽可能快地恢复尽可能多的亚微米FID信号。 采用双通道异相信号组合。 两个RF接收线圈被布置成具有相同的振铃特性,优选彼此相互垂直。 由一个线圈接收的RF信号相移180°,放大,并与由另一个线圈接收的放大的RF信号组合。 振铃分量取消,而相位正交的FID分量不能。 发射机/接收机设备可以是双工或交叉线圈配置。 在后一种情况下,接收器线圈中的一个可以平行于主场定向,使得其不接收FID信号并且仅操作以减少死区时间。 本发明特别适用于使用脉冲电子顺磁共振(EPR),用于检测生物系统中的自由基或用于脉冲核磁共振(NMR)的成像器和光谱仪,其中弛豫时间为100ns至10 亩。