1995 Volume 48 Issue 9 Pages 952-953
MS-444 is a novel myosin light chain kinase inhibitor, isolated from the culture broth of Micromonospora sp. KY7123. The structure of MS-444 was determined to be 5, 8-dihydroxy-3-methyl-(9H)-naphtho[2, 3-c]furan-4-one by means of spectral analysis.