You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[2-[[1-oxo-1-[(1,1,3,4,6-pentahydroxy-5-methylhexan-2-yl)amino]-3-sulfanylpropan-2-yl]amino]ethylamino]-3-sulfanyl-N-[2,4,5-trihydroxy-6-(hydroxymethyl)oxan-3-yl]propanamide .
user
C21H42N4O12S2
assistant