LC determination of impurities in methoxsalen drug substance: isolation and identification of isopimpinellin as a major impurity by atmospheric pressure chemical ionization LC/MS and NMR
2003 ◽
Vol 33
(4)
◽
pp. 627-637
◽
1999 ◽
Vol 732
(1)
◽
pp. 55-64
◽
2002 ◽
Vol 16
(7)
◽
pp. 650-654
◽
2005 ◽
Vol 824
(1-2)
◽
pp. 36-44
◽
2008 ◽
Vol 862
(1-2)
◽
pp. 64-71
◽
1997 ◽
Vol 11
(3)
◽
pp. 259-264
◽
1997 ◽
Vol 703
(1-2)
◽
pp. 115-127
◽
1999 ◽
Vol 1
(4)
◽
pp. 307-311
◽