Safety and Efficacy of CBP-0276 in dose of 200mg/ twice dose a day, or placebo administrated for 36 weeks, to improve severity and quality of life on moderate to severe psoriasis in subjects 18y to 70y: Randomized, double blind, phase 2, Proof of Concept, placebo controlled clinical trial. Primary Aim: To assess the effect over 18 weeks of oral CBP-0276(Dose 200mg/day twice dose a day), or placebo on Psoriasis Area and Severity Index (PASI)75; Secondary Aims: To assess the effect over 6,12,18,24, 30 and 36 weeks of oral CBP-0276 (Dose 200mg/day twice dose a day), or placebo on static Physician's Global Assessment (sPGA) score of 0 or 1, PASI50, PASI90, PASI100, Scalp-specific Physician's Global Assessment (Ss-PGA) 0/1 with at least a 2-point improvement among patients with a baseline ss-PGA ≥3, sPGA 0, PSSD symptom score of 0 among patients with baseline score ≥1, Dermatology Life Quality Index (DLQI) 0/1 among patients with baseline DLQI ≥2, Percentage of subjects which achieve The Minimum Clinically Important Difference (MCID) on DLQI (a ≥4-point reduction from baseline), Frequency of solicited and unsolicited adverse events (SAEs and USAEs) (Medra), and Changes on inflammatory and anti-inflammatory cytokine levels during treatment (IL-17, IL-23, IL-6, TNF-alpha, IL1-b, IL-10). Adults 18 years to 70y of age with moderate to severe plaque psoriasis who fulfill the inclusion criteria will be included in the study. Patients with a history of prior therapy, including biologic therapy, could be included after specified washout periods before randomization. Subjects will be included in 2 different groups: Group 1 to receive 200mg oral twice dose a day of CBP-0276 for 36weeks and Group 2 to receive Placebo for CBP-0276 for 36weeks. Throughout the trial, patients, investigators, and sponsors providing oversight remained blinded to treatment assignments. The collection of nonserious AEs will start at initiation of study treatment until the final study visit. All SAEs will be collected from the date of the patient's written consent until 30 days after the final dose of the study drug or patient's participation in the study if the last scheduled visit occurred at a later time. The AEs of interest will include malignancies, infections (serious, opportunistic, fungal, tuberculosis, and herpes zoster), thromboembolic (arterial and venous) events, major adverse cardiovascular events (MACE; cardiovascular death, nonfatal myocardial infarction, and stroke), and skin events (acne and folliculitis). Solicited AEs will include select infection AEs, certain cardiovascular events, and suicidal ideation and behavior. All AEs will be coded according to the Medical Dictionary for Regulatory Activities (MedDRA, version 28.0).