The order of addition of {HEAD ~ the components} of this process is not critical to {TAIL ~ the preparation} of the azetidinone product 
The order of addition of { HEAD ~ the components } of this process is not critical to { TAIL ~ the preparation } of the azetidinone product
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH