(1S,4S,7S,10S,12R,14R,16S,18R,19R,20S,24R,27S,28S,29S,30R,31R,32S,33R)-18-[(2S)-3-amino-2-hydroxypropyl]-12-methyl-6,13-dimethylidene-19-[(trideuteriomethyl)oxy]-4,7-epoxy-10,14-epoxy-24,28-epoxy-30,33-epoxy-17,35,36,37-tetraoxapentacyclo[27.5.1.11,32.127,31.016,20]heptatriacontan-22-one methanesulfonic acid