r. , ( nmr in biomedicine 1 , 50-55 , 1988 ) three hepatomas ( rapidly growing morris hepatoma 7777 and slow growing 9618a , and the ua hepatoma ) had negligible phosphocreatine ( pcr ) or creatine ( cr ) in acid extracts but frequently had pcr signals in surface coil spectra .
C0010286
creatine
C0031634
pcr