You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (2S,4R,9R,21S)-2,21-bis(prop-2-enyl)-26-aza-3,10,13,20-tetrazanidatetracyclo[20.3.1.04,9.014,19]hexacosa-1(26),22,24-triene;dichloromanganese;molecular hydrogen ?
user
C27H45Cl2MnN5-4
assistant