ddC vs DDC

ddC and DDC both are nouns.

Word	Noun	Adjective	Verb	Adverb
ddC	Yes	No	No	No
DDC	Yes	No	No	No

As nouns, ddC and DDC are synonyms defined as:

ddC and DDC: an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI)

Other synonyms of ddC include dideoxycytosine, zalcitabine.

ddC (noun)	DDC (noun)
an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI)	an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI)