Extract Multiple Text Strings From A Long Text String

An original text string entry appearing in an Excel cell would be:

"N7C Neuroprotective J5Z Antiviral, other M2Z Antiarthritic, other J5A Antiviral, anti-HIV"

I need to extract N7C, J5Z, M2Z and J5A from this string and list these alphanumeric values in separate cells adjacent to the original text string. The challenge is that these alphanumeric references may appear in different positions within the original string with no fixed value e.g. a "," separating them. The alphanumeric references may also be 3 or 4 characters in length and there may be different numbers of alphanumeric references in the original string.

Another example would be (very different from the first):

"T2Z Recombinant, other K5B Radio-chemoprotective J3Z Antibacterial, other D3A Vulnerary A10C Symptomatic antidiabetic K6Z Anticancer, other R8A Antiasthma B6A Septic shock treatment I1Z Immunostimulant, other S1Z Ophthalmological R8B Antiallergic, non-asthma M1A1 Anti-inflammatory"

You can see that in this further example "A10C" & "M1A1" are 4 character alphanumeric strings wheras the others feature 3 characters.